YuYu Hakusho: "Just kill us if you're going to. Just spare us the sound of your voice." Oh, Hiei...
In Naruto, during the preliminary fights of the Chunin exams, Shikamaru say this to Kin:
If you're so tough get it over with. Stop wasting my time.
In Robotech, Miriya, after Max knocks away her knife with a rock:
I lost to you again! This is a shame I cannot endure. End my life... please.
In The 08th MS Team, Capt. Packard manages to fry Shiro's cameras, blinding him in the middle of combat. As Shiro fumbles around for a spare circuit to repair the camera, his Gundam shakes violently. When nothing actually happens, he screams "Just finish me already!", believing that Packard is playing with him before killing him. He's not, he's actually using Shiro's Gundam as a shield against the rest of the 08th Team, who have just arrived to help.
In One Piece, previous Big Bad Captain Morgan is revealed to have been a part of Captain Kuro's backstory, when the latter massacred an entire ship that the former had been part of the crew of, leaving only Morgan alive. Morgan then pulls this, only for Kuro to reveal that he needs Morgan alive as part of his plan to fake his own death. Thanks to hypnosis, Morgan doesn't remain aware of this long.
Daddy Masterson also does this after losing a duel with Yassop, member of Shank's pirate crew and Ussop's father. Yassop spares him upon realizing that Masterson had a daughter; having abandoned his own family to be a pirate, Yassop reasons that "One useless father like me in the world is more than enough", and further justifies it by pointing out that pirates don't have to kill unless they feel like it.
Mugen says these exact words at least twice over the course of Samurai Champloo.
In Deathstroke, a young assassin named Janissary came after Deathstroke. The fight ended with Janissary's hanging by one hand from a bridge with Deathstroke standing over him and telling Deathstroke to end it. Deathstroke retorts that if J wants him to kill him, J will have to hire him.
Rose Walker from The Sandman; to make a long story short she is a vortex of the Dreaming and it is within Morpheus' obligations to kill her, and after apologizing for the nth time she just tells him to shut up and do it. Played straight in that her grandmother, the original vortex, appears to take her place.
Exeter says this to Ethan in Scion after one fight of theirs goes badly for him, but Ethan spares his life.
The titular character in Lobster Random does this. On the first panel he appears in.
At the end of Zulu, after a full day of desperate fighting, the Zulu have gathered on the surrounding hills, chanting. The commanding British officer gets sick of their apparent taunting and shouts for them to just attack already, what are they waiting for? Whereupon their Boer guide explains that that is actually a salute, for their courage... and everyone breaks down laughing with relief.
Variation in Predator. After being tracked down by the Predator, Dutch repeatedly says "Come on!", "Do it!", "I'm here!" and "Kill me!" to it in an attempt to get it to walk into a Booby Trap.
Marv in Sin City, at his own execution: "Would you hurry it up? I haven't got all night."
Groucho:(to a gangster who has just walked in on Groucho making googly-eyes at his girl) Well, if you're going to kill me, hurry up; I have to take my tonic at 2.
During the so-called "climax" of Shrek the Third, Shrek asks Charming to kill him first and then sing, much to the amusement of Charming's captive audience.
Variation in Darkman: "If you're not going to kill me I have things to do."
In The Wild Bunch, they are riding away after a massively cocked-up holdup, and one of the wounded Bunch (who was shot in the face) pleads with Pike to "Please...just ki—" (Pike shoots him before he even says it.) Which cues the following exchange:
Pike: You boys want to move on or stay here and give him a... decent burial?
Downplayed in the original The Last House on the Left, due to the victim in question saying it only once whilst actively trying to put obstacles and distance between himself and his attacker.
In the film Patriot Games, as the Irish terrorists rescue their leader and begin executing the guards who were escorting him to prison, the leader asks the police inspector in command, Robert Highlands if he has anything to say.
Insp. Highlands: "Just get on with it and be on your way."
Rorschach's final words in Watchmen before Dr Manhattan kills him.
"What are you waiting for? Do it. DO IT!"
The Duellists. After d'Hubert wins the final duel, Feraud eggs him on to kill him. D'Hubert lets him live with his defeat instead.
Robert A. Heinlein's The Star Beast. Johnny's alien pet Lummox has been sentenced to death. Johnny helps Lummox escape, but they're hunted down and trapped. One of the pursuers approaches them.
Johnnie found that tears were streaming down his face and that he could not stop them. "Go ahead!" he cried, his voice misbehaving. "Get it over with! He never meant any harm! So kill him quickly . . don't play cat-and-mouse with him." He broke down and sobbed, covering his face with his hands. [snip]
The officer looked distressed. "What are you talking about, son? We aren't here to hurt him. We have orders to bring him in without a scratch on him - even if we lost men in the process. Craziest orders I ever had to carry out."
In Rick Riordan's The Last Olympian, Percy interrupts a (divine!) quarrel to tell them that if they mean to kill him, they should get on with it.
In Simon Spurrier's Night Lords novel Lord of the Night, when the Inquisitor summons Mita — for execution or mind-wipe, she assumes — she tells him during the meeting to do it and get it over with.
In the Back Story, when the Night Haunter's assassin hesitated, he told her "Now do your job and be done with it."
A famous quote from Polish novel The Deluge, when Anti-Hero Andrzej Kmicic faces Knight in Shining Armor Michal Wolodyjowski - the "small knight" and a master fencer. The latter easily hits the first a couple of times, and Kmicic asks to end this and spare him the humiliation.
In Jim Butcher's The Dresden Files novel Small Favor, when Harry defeats the gruff at Union Station, it tells him to finish it. Twice. Whereupon Harry says he does not kill unless necessary, much to the shock of the gruff, who had assumed he was actually in Winter Court.
In Turn Coat, Harry pulls this on the skin-walker, shocking it.
In Stephen Hunt's The Kingdom Beyond the Waves, Bull says this not about death but being assimilated into the Daggish.
In George R. R. Martin's A Song of Ice and Fire novel A Clash of Kings, Jon Snow prepares to kill the captured wildling Ygritte, which he is reluctant to do both on account of her gender and that she had surrendered. For her part, she faces death with equanimity, although it's plain she'd rather not die. Finally she tells him to hurry because she "can't stay brave forever." That's when he tells her to go.
"Let the pain stop... let him kill us... end it, Dumbledore... death is nothing compared to this..."
In Dan Abnett's Gaunt's Ghosts novel First & Only, Flense threatens to shoot Dorden, whom he is holding hostage, if Gaunt mocks him. Dorden tells Gaunt to mock on, so he can be shot rather than listen to Flense's "garbage."
In the Star Wars: Tales of the Bounty Huntersanthology, there's a story about how Boba Fett escaped the Sarlacc. The Sarlacc, as the story reveals, is more or less sentient, sort of having the mind of its first victim, and preserves its victims for millennia, getting it to tell them their life stories and forcing them to relive the memories of others while being kept immobile and dissolving; it keeps them even after death. Fett, hearing this, demands to know why it doesn't just kill these people, is told/shown an old joke. It's about a farmer with a meat animal that has one leg missing, that apparently can sing and speak and take care of the farmer's children. Asked why it has a missing leg, the farmer says "A barve like that, you don't eat it all at once." Much later, after escaping and healing, Fett hovers in his ship with the weapons pointed at the Sarlacc, and it tells him You liberate me from the long Cycle. But he doesn't shoot it, and when it wants to know why, he repeats that joke's punchline.
When Bevel Lemelisk, the designer of the Death Star - who Emperor Palpatine had painfully killed and cloned back to life again and again for missing the flaw that got the Death Star destroyed - is finally executed by the New Republic, his last words are "Do it right this time."
In C. S. Lewis's The Great Divorce, when an angel tells a damned soul that he can only be free of the lizard if he gives the angel permission to kill it, the soul argues the point for a time, then says the angel can — and to do it — before collapsing and whimpering "God help me" — without rescinding the permission.
In his allegorical novel The Pilgrim's Regress, John meets Death in a mountain pass on a stormy night. John realizes that it has been the fear of death that has motivated him his entire life. Death hammers home that he only has two choices:
"What am I to do?" said John. "Which you choose," said the Voice. "Jump, or be thrown. Shut your eyes, or have them bandaged by force. Give in or struggle." "I would sooner do the first, if I could." "Then I am your servant and no more your master. The cure of death is dying. He who lays down his liberty in that act receives it back."
In Robert E. Howard's "The Scarlet Citadel", Conan the Barbarian, facing a giant snake, stands still out of instinct; reason would have told him to get it over with by provoking the snake into an attack.
In the miniseries Merlin-1998: after Mab kills Morgan, Frik rages at her in his grief, calling her an "evil old crone." In revenge, Mab strips him of magic. When Mordred asks why she didn't just kill him, she says "Because that's what he wanted me to do."
Dr. McCoy: Well, either choke me or cut my throat. Make up your mind. Khan: English... I thought I'd dreamed hearing it. Where am I? Dr. McCoy: You're in bed, holding a knife at your doctor's throat. Khan: Answer my question. Dr. McCoy: It would be most effective if you would cut the carotid artery, just under the left ear.
He also said it right out in "The Empath", after having chosenhimself for torture that had an 87% chance of killing him.
Lal: Doctor, please understand that if there was any other way to accomplish our purpose— McCoy: Get on with it.
Jack Bauer: I just want you to know, I didn't want you to feel like I had turned my back on you, that I turned my back on the family. I just had to go in my own way, to do things for myself, and I... was never good enough for you. I'm sorry. Anyway... I'm ready. What are you waiting for...? DO IT! DAMN YOU!
Lee Adama: No. Unless... The clean slate. The fresh start. Maybe they are illusions like you said. But at a certain point, faith in ourselves, in our right to survive as a species, as a people, that's not a given, that's a choice. Well, I've made mine. And if you can't stomach that, then you had damn well better squeeze that trigger right now. Go on. What are you waiting for?
Stargate Atlantis: The third-season episode 'Common Ground', where the Wraith Todd is first introduced. After repeatedly feeding on Sheppard to the point that he's almost become a desiccated corpse, Sheppard intones him to do this. Then Todd gives back all the life-energy he took from him because Sheppard helped him escape from a Genii prison.
Sheppard: Finish it.
"Todd": As I told you, John Sheppard, there are many things about Wraith that you do not know.
Twisted a little with Hugh in The King's Demons. He tries to demand it after the Doctor had persuaded the king to spare him, as he is humiliated by his failure.
Season Three of The Wire, Omar Little and Brother Mouzone, discover Stringer Bell's plan to have them murder each other and team up to track him down. They have him cornered at gunpoint, when Stringer says "Get on with it, motherf-". They do.
In the season 5 episode of Supernatural, "Dark Side of the Moon," Dean is sitting in his hotel room at gunpoint as Roy and Walt argue over whether or not to kill him. He finally growls, "Go ahead, Roy, do it. But I'm gonna warn ya—when I come back, I'm gonna be pissed." This can be viewed as a variation on the trope because Dean knew Zachariah would just resurrect him anyway.
In season 4, Dean is given an ultimatum - to hand another character over to die, or go back to hell. He initially doesn't think they'll do it, but once convinced they will, still tells them to go ahead. They switch to threatening Sam instead, and he complies exactly as Sam had planned.
In "The End" Dean travels into the future where the Apocalypse has happened and Lucifer is winning. After a final desperate attempt to kill Lucifer leads to the death of his friends, Dean witnesses Lucifer-in-Sam's body casually snap future!Dean's neck. Realising all is lost, Dean tells Lucifer to go ahead and kill him. Lucifer quips, "Don't you think that would be a little...redundant?"
Avon cuts through the crap when an alien intelligence offers him submission or death.
Alien: Think about human death, Avon, irrevocable...
Avon: I have thought about it, what's keeping you?
Alien: What did you say?
Avon: You claim you can kill me. You'd better get on with it. Make me die. There's nothing else you can make me do.
Subtle double subversion in the first season finale of Terriers. After Hank is framed for murder and hauled off to jail along with the actual murderers who almost certainly mean to do away with him as soon as they're alone, he starts yelling at them to get it over with and kill him right there in the police car. Doubly subverted in that a) he's partly doing it to get the cops to take him seriously and help him, and b) the cops were already secretly on his side and were planning to let him go anyway.
An episode of Dr. Quinn, Medicine Woman had the sheriff preparing to hang a man convicted of rape and murder. When the minister ask if he as any last words, the man simply snarls, "Get it done."
In the first season episode of Angel "Eternity," actress Rebecca Lowell tries to persuade Angel to turn her into a vampiress so that she won't have to worry about aging; needless to say he refuses. In an effort to change his mind, she drugs him, thinking just to render him more pliable, not realizing that this will turn him evil instead. He stalks her through his office complex, toying with his prey, deliberately putting off the murder so as to enjoy her fear; she is clearly terrified, but finally gets fed up with this, stops running, and turns to face him, saying "Whatever you're going to do, do it." Of course, that's when Wesley and Cordelia show up to save the day, but it was a pretty awesome moment for Rebecca, and it did somewhat redeem her from her earlier behavior.
Both Aribeth in Neverwinter Nights and Bastila in Knights of the Old Republic insist you kill them, as they have come too far to turn back to the good side if you persist in trying. However, both works being rather on the idealistic side, they both relent and come back if you previously completed their Romance Sidequest or roll a really high Persuade check.
However, even if you convince Aribeth to surrender, later events establish she didn't live long after anyway.
Subverted by the Boss in Saints Row 2. After outright cheating in a sword duel, the Boss catches Akuji with no weapons, with a gun pointed to his head. Akuji utters this trope. Instead of finishing him, or leaving him alive, the Boss goes to his/her back, picks another sword, stabs through Akuji's defenseless body, calls his/her friend Mr. Wong, and purposefully aggravates the wound to make Akuji scream in pain to the phone. Then (s)he leaves him alive, in a burning, soon-to-explode ship.
The Walking Dead: Andy St.John will do this after Lee escapes and kills the rest of the St.Johns
In Final Fantasy XIIJudge Drace does this to Gabranth, urging him to carry out Vayne's orders to execute her because she doesn't care if she dies, so long as Larsa (Vayne's brother) will still be protected by someone she can trust.
During the introduction to The Elder Scrolls V: Skyrim, a captured Stormcloak soldier says this trope word for word, interrupting the priestess giving him and the other prisoners their last rites before being send to the executioner's block. He quickly gets his head cut off, insulting the Imperials on the way, but if he had waited then he would have likely survived thanks to Alduin.
Andrei Ulmeyda of killer7 does this as he's turned into a Smile.
Ulmeyda: "Damn. Get this over with! Once and for all... Ah! AH! AH! AAAAAAAAAAAAHHHHHHHHHHHHHHHH!"
Mother Brain: Guess it's time for me to die then...
Samus: No! It's time for you to LIIIIIIIVE! [Evil Laugh]
In KateModern: The Last Work, the dying Tez On Toast starts taunting the heroes, telling them to finish him off. Charlie replies that they don't need his murder on their conscience, to which he retorts, "What are you talking about? You've already killed me!" They walk off, leaving him to bleed to death.
Dracula in A Day in Dracula's Lifequits trying to do anything to Richter Belmont, who had been made invincible by Maria's Big Damn Heroes moment on top of all the Whoring, and decides to lay down and tell Richter to kill him. When Richter doesn't comply with killing him right then and there, Dracula realizes that the fight is supposed to look convincing because it's Castlevania: Symphony of the Night (Or Castlevania: Rondo of Blood or whatever). Dracula, wanting to be put out of his misery already, sighs that he has to do this and tries to attack Richter, who throws another Hydro Storm. Dracula dies, sarcastically saying This Cannot Be!, but manages to call Richter a "fucking ass" one last time after he stops screaming.
The Chuck Jones Hubie and Bertie short, Cheese Chasers.
There was a Beast Wars episode where Rhinox was captured by Megatron. If he had died there, he would have gone out in a pretty badass way (Not the fact that he was chained down with no way of moving, but his last words helped make up for it)
Rhinox: If you're going to kill me, then shut up and get on with it.
During Silverbolt's brief tenure as a Predacon, the Maximals take him down and he tells them to get on with destroying him. Dinobot, admittedly, is happy to take him up on it, but Rattrap and Cheetor firmly refuse; this is what convinces Silverbolt he's on the wrong side.
The Transformers Prime episode "Rock Bottom" puts human sidekick Jack in the position to take out Megatron himself. Jack is at the controls of a Drill Tank, Megatron pinned down by a cave-in.
Megatron: Well, what are you waiting for? Think of the glory! Seize the day! Optimus would.
Jack: No. He wouldn't. Not like this.
Megatron: I will be sure to share the details of our little conversation with Optimus...the day I rip out his Spark.
A variation occurs in the second season with Zuko. He isn't looking to be killed directly, just for some lightning to strike him (so he can try to redirect it), but the tone is very much in line with this trope as he rails at the heavens not to hold back.
The Roman statesman Marcus Tullius Cicero, upon being caught by his political enemies assassin, is recorded as saying "There is nothing proper about what you are doing, soldier, but do try to kill me properly."
Che Guevara's last words were supposedly "I know you've come to kill me. Shoot, coward, you are only going to kill a man!"
The last words of Giles Corey, pressed to death over two days during the Salem witch trials:
The man was being savvy: he knew at that point that he was in a no win situation. The inquisitors wanted him to confess to witchcraft, hence the torture. The result of the confession would be a long trial in which his confession is hung on him several times, the ruin of his family, and of course, his execution. Naturally, not confessing would not gain his freedom: he'd remain in the press until he confessed or died. The Salem inquisitors had the art of the Catch-22 down. He forced them to perform the trope name, robbing them of the show trial and confiscation of goods that the inquisitors would have gained otherwise.
Actually, during the Salem trials, confession would save you from execution. That's why some did confess: it meant pardon, absolution, and redemption. It also meant condemning every other innocent who refused to confess. Not to mention the perpetual shame on yourself and your family and the knowledge that you had lied.
However, there was a rule back that if you did not plead anything, they could not try you. So he refused to plead innocent or guilty. By doing this, his family was allowed to retain their land since land of a criminal is taken by the government, or something like that. The court tried to get him to plead something so they could try him, but he chose to die instead under torture. Thus charges were never officially brought to him.
Actually, his property could not have been confiscated, but he might have believed that it could. He had earlier expressed suspicion that his wife was a witch although he changed his mind. The idea of a victim of pressing saying "more weight" was a traditional trope (which doesn't make Corey less heroic).