American History X, documenting the descent into white supremacist ideology by two blue-collar American brothers, literally uses this trope. Derek, the older brother, finishes off one of the would-be black robbers this way after gunning them down.
Suspiria. The head witch was invisible while summoning the zombie of Suzy's friend Sara to kill Suzy. However, her powers of invisibility weren't as strong as she thought, as an outline of her form started appearing, giving Suzy the chance to kill her with a single stab to the neck, before the zombie could reach Suzy. She died without any struggle.
Boogie Nights features a literal example in which Rollergirl demonstrates an alternate use for her skates.
In Kill Bill 2, The Bride has one of these when she kills Bill, the Big Bad of the series in seconds by hitting him 5 times, causing his heart to explode.
In the climactic fight of the prison boxing movie Undisputed (2002) Monroe takes a beating in the first few minutes but the rest of the fight played this straight.
Wolverine and Sabertooth fight three times during X-Men Origins: Wolverine, with Sabertooth getting the upper hand the first time, the second ends indecisively, while in the third, Wolverine beats ten shades of sunshine out of Sabertooth in around ten seconds.
Iron Man: Tony Stark's Power Suit vs. a group of batshit crazy terrorists armed with powerful automatic weapons, grenade launchers, and tanks = Ridiculously easy Stark victory, usually in under 6 full minutes. The more he upgrades the armor, the more epic the curb-stomp.
Serenity River defeats both a room of thugs in a Bad Guy Bar as well as a horde of reavers with barely a scratch on her.
Similar to the above example is Leeloo in The Fifth Element vs a large array of mooks.
The Kraken attacking the merchant ship in Pirates of the Caribbean: Dead Man's Chest can hardly be called a battle. It resembles the Kraken grabbing into the ship for a snack of sailors and then crushing it like an empty soda can once it's finished.
Most of the fights in Ip Man that the titular character is in. The film was explicitly meant to glorify him and be all nationalistic. The opponents he Curb Stomps usually were Curb Stomping their opponents before he shows up. An arguably deliberate Lampshade Hanging occurs in the final fight against General Miura, where Ip Man caps off by pinning the other guy against a pole and going to town with a No-Holds-Barred Beatdown while scenes of his practice on a training dummy are interposed.
Last of the Mohicans: Magua, who throughout the film has shown himself to be a total Bad Ass by killing pretty much everyone he wants to kill, squares off with Uncas (himself a pretty fair badass) for the fate of a pretty girl and kills the poor boy with ease. Then Uncas's elderly father rushes forward for some payback, and takes Magua apart in seconds.
Neo's final battle with Smith in The Matrix. After running from the Agents during the whole movie, Neo finally becomes the One and transcends physical fighting. He's able to defeat Smith literally with one hand behind his back, without even looking. There's some snapback in the sequels, where Neo is no longer able to instantly defeat any Agent, which is handwaved as "Upgrades." Even still, we're not expected to see them as a legitimate threat.
Any fight with any character other than Neo against an Agent ends up this way with the Agent doing the beat down.
The Battle of Zion in Matrix Revolutions. The humans appeared to be holding their own until the Sentinels swarmed en masse and annihilated most of the city's defenses within 30 seconds. The rest of the battle was just the Sentinels mopping up survivors.
Pretty much all fight scenes in Watchmen are like this. The best example is Dr. Manhattan vs the North Vietnamese army. The poor saps barely get to run a few steps before getting disintegrated.
Equilibrium: Every battle that Preston gets into, he wins effortlessly. Of particular note is his fight against The Dragon, Brandt. They'd fought to an apparent impasse while training, but now Preston wins with a Single Stroke Battle.
Kurt Wimmer loves these. In Ultraviolet, Violet squares off against a dozen fellow hemophage assassins. The other Mooks were just humans, but these guys have all the same supernatural powers that she does. And they do the same thing she does. And there's a dozen of them. All of them combined should present some kind of threat, right? Right? After two seconds, we find out no.
In A Christmas Story Ralphie knocks down the bigger and older bully Scut Farkas and proceeds to sit on him and pummel him.
Blade does this after drinking quite a lot of blood in both the first film and the sequel.
In The 13th Warrior has this as a surprise. One of the hero warriors seems to be getting his ass kicked in a duel. Then just as he seems to be on the brink of defeat, he casually dodges his opponent's blow and lops his head off. The entire fight was a Curb Stomp Battle that he pretended was close to teach the villagers to respect the heroes.
in Raiders of the Lost Ark, Indiana Jones is faced with a skilled swordsman in the midst of a more involved fight/chase scene. Obviously too fed up to deal with him at the moment, Indy pulls out a gun and shoots him, effectively putting an end to the fight before it could get started. The legend is that it was initially scripted to be a fight, but Harrison Ford was suffering badly from diarrhea and improvised to cut the scene short and remove any potentially unpleasant running around.
The young and reckless Paris challenges hardened warrior Menelaus to Combat by Champion, and gets an asskicking. His defeat is so absolute it ends with him literally crawling towards his brother to get away.
In the first fight, Achilles runs towards the enemy champion, dodges two thrown spears on the way, reaches him and kills him without breaking pace.
In Transformers, Jazz made a valiant effort to attack Megatron and keep him away from the others, but it did not end well. Optimus Prime does this most memorably against Bonecrusher.
In Transformers 2, most fights in the second movie go this way. But when the Decepticons are wading headlong into the combined air-ground fire of entire battalions of a military that is equipped to fight them and is working alongside the Autobots, that's a given.
Starscream vs Ironhide and Ratchet in the Mission City battle. The two Autobots are temporarily taken down in ten seconds while Starscream didn't even scratch his paint job.
In Transformers 3, the final fight between Optimus Prime and Megatron turned out this way. Megatron won't be coming back this time.
In GI Joe The Rise Of Cobra, the Cobra attack against the NATO convoy is a perfect example. Every shot from the Cobra gunship annihilates a NATO vehicle, their heavy machine gun bullets just bounce off of it, and when they fire missiles at it the gunship spins around in midair and shoots the missiles down. Once the Cobra Vipers disembark, they perform an Unflinching Walk through assault rifle fire. It doesn't turn into an actual fight until the Joes arrive.
In Avatar the first major fight is this, with the RDA wiping out the Na'vi Hometree (and, unbeknownst to them, killing their leader in the process) without so much as a single casualty. Indeed the only downside to that fight for them, beyond seriously pissing off the Na'vi, is causing a couple of Heel Face Turns in their own troops.
As a deliberate parody of action movies, the titular character in You Don't Mess With The Zohan is a literal One-Man Army to the point that the Israeli counter-terrorist unit constantly tricks him into taking out terrorists all on his own without even giving him a gun. At the start of the movie, Zohan is shown to be eliminating an entire terrorist cell by himself.
The battle between the SEALs and Hummel's forces in The Rock.
Taken. All of Taken. Liam Neeson curb stomps the entirety of Paris, except for his fight with The Dragon.
The title character from Book Of Eli does this to most of the bad guys he comes across.
In the sequel to Disney's Aladdin, Return of Jafar, Genie Jafar utterly curbstomps the weakened Genie — during his Villain Song no less!
Happens to Castor Oyl in the live action Popeye movie when he signs up for one round with a professional boxer - you wouldn't really expect it go go any other way though, especially when said boxer is named Oxblood Oxheart.
The final fight between The three protagonists and Sam at the end of Kidulthood. Sam spends a few minutes beating the hell out of Trife, when he gets attacked from behind by Jay, who is thrown on the floor and beaten down in under a minute, before Sam shoves the third protagonist aside with little effort. The other twenty or so people present are too scared to anything. Although, when Sam attacks Alisa, Trife Curbstomps him back.
The first time Danny goes into an underground prize fight in Unleashed, he is pitted against the reigning champion. Since all fights are death matches, and this guy has been the champ for a while, you can expect this fight to be brutal. You would be wrong. As soon as it starts, Danny punches him in the throat three times in quick succession, and the guy keels over.
In the introductory scene in Darkman warehouse owner Eddie Black and his dozens of workers thoroughly frisk Durant and his small handful of goons. Eventually, it is revealed that Durant had an ace up his sleeve, the wooden leg of an invalid gang member was actually a machine gun. With some creative acquiring on site after the initial volley of bullets, it is revealed that most of Durant's gang is left standing (possibly one casualty). The only one left standing on the other side is Eddie himself (and not for much longer).
In Bad Day at Black Rock, Spencer Tracy delivers an epic beatdown to a thug played by Ernest Borgnine. Made all the more awesome by the fact that Tracy's character is a Handicapped Badass, and he is literally fighting the thug singlehanded.
In The A-Team, Pike literally believes himself to be the toughest guy on the planet and takes great pleasure in beating down an (at the time) pacifistic B.A. Baracus. At the end of the film, B.A. promptly shows him how wrong he is in this belief.
Lord of the Rings: A battalion of treeherders vs one of the two most powerful wizards in the world, with the wizard having home-fortress advantage. The ents win. Helped that most of the wizard's army was away doing their own curb stomp.
The Battle of Helm's Deep starts off as a curb stomp for the defenders as the Uruk-hai got past every defense and killed most of the defenders. The battle turns into a curb stomp for the Uruks, however, after Gandalf and the Rohirrim show up. Granted the defenders still manage to kill plenty of Uruk-hai, the only reason it's a curb stomp is because there are only a few hundred defenders against 10,000 Uruks.
Even more of a curb-stomp in the Extended Edition when the surviving Uruk-hai run into the Huron forest.
In Thor, The Destroyer does this to the Warriors Three and Sif. When Thor arrives, he turns the tables around. The same thing happens earlier when Thor fights (flies straight through the head of) the giant ice monster.
Apollo Creed's fight against Ivan Drago in Rocky IV. Apollo, being past his prime, was no match for the juiced-up Soviet.
The final fight scene in Gladiator is a great example of this trope done well, when mortally wounded Maximus methodically, painfully, and extremely satisfyingly takes Commodus apart in front of the entirety of Rome, with Commodus landing only one minor blow early on.
The first battle counts as well. The Romans were able to route most of barbarians before the lines even met with barrage of flaming projectiles. We only see a handful of Romans perish (mostly to a single big guy with a giant axe), while any Germans that fought were ripped to shreds.
Aliens sets the Colonial Marines up as well-trained, hardened badasses who will probably fare much better than the crew of the Nostromo. A few minutes in once they reach the alien nest, nearly 3/4ths of the squad is killed or cocooned.
An example occurs in the Hitman movie. Even ends with a very literal and abrupt curb stomp by 47. Most others in that movie are curb stomp battles as well, but not so literal.
The Last Starfighter has these all over the place. Alex almost gets curb-stomped by the first assassin to show up at his home (until Centauri shows up and rescues him), convincing him to go back and fight, until he finds out the Rylos got so thoroughly curb-stomped in his absence that he, Grig, and their prototype Gunstar are the only defense left for the entire Star League. Only after he curb-stomps a few enemy spy ships does he realize that he really IS good at this, and manages to curb-stomp the entire Ko-Dan armada (including command ship) in about two passes.
In the 2011 film Warrior: Tommy overwhelms all of his early opponents with superior speed and power, quickly defeating them in brutal fashion. His fighting style highlights his role as the Anti-Villain of the film.
In their first fight in The Dark Knight Rises, Bane absolutely crushes Batman. He lets Batman hit him many times with his most powerful blows and gadgets only to show Batman that there's nothing he can do to beat him, and by doing so, break his spirit. Then he starts fighting back and for the rest of the fight, Batman is in desperation mode, trying everything to slow him down but nothing works. Eventually Bane takes Batman and cracks his mask while it's still on his face and, in a recreation of one of the most iconic moments in comic-book history, lifts him up over his head and breaks his back over his knee. He ends the fight by ripping the mask off completely and throwing it away.
At the end of the film, Batman repays the favor. It ends with Bane on the floor in excruciating pain. It helped that this time Batman knew how to fight him.
In X-Men: First Class, Sebastian Shaw casually sends Erik Lensherr (Magneto) flying across the room several times by merely tapping him. In desperation, Erik tries to use metal to restrain Shaw, but Shaw casually tears through it and pins him against a wall. Erik only wins because Shaw stops to give a We Can Rule Together speech. Erik takes the opportunity to knock away Shaw's helmet, allowing Charles Xavier to paralyze Shaw with his mental abilities.
Subverted in Snatch when Brad Pitt's Pikey boxer has seven shades of shit punched out of him by Gorgeous George, but it turns out he's hustling. When he decides to fight back, he knocks George unconscious with a single punch. He does the same thing again later on.
The 2011 remake of Footloose has Chuck and his goons show up to Bomont's prom. Two of them grab Renn's friend Wilard and hold him down and start punching him, and he doesn't fight back until his girlfriend tells him to. A few seconds later, he beats the ever living hell out of them, his girlfriend starts to take out another goon, and then Renn arrives and knocks Chuck out in what has to be the most failed attempt at a mugging in Bomont's history.
In Predator, Arnold's commando team is shown curb-stomping a group of South American rebels. This is intended to make the Predator itself that much more formidable as it proceeds to curb-stomp them one by one.
In The Hobbit Thorin receives one from Azog the Defiler, whose giant mace and warg slam Thorin into the floor without him getting a single hit in.
The original Spider-Man film, the Green Goblin throws Spider Man through a brick wall, throws a grenade in his face and beats the crap out of him, Spider Man appears completely beaten, until the Goblin threatens to finish off Mary Jane "nice and slow" then Spidey curb stomps the Goblin.
In the fourth Wishmaster, a bouncer throws the Djinn out of a club, and beats him up while the Djinn tries to get him to make a wish. After he's finished, he wishes that the Djinn would put up a better fight. No points for guessing how this turns out.