It's basically ending a sentence with a comma and "Bitch!", as a way of someone verbally making an exclamation point in dialog.
It did get overused, so now it's a Discredited Trope. You're as likely as not to see it thrown in a sentence just to be funny, even though there is no other reason to emphasize a point this way. Bitch.
This can overlap with Quote Swear Unquote, Obligatory Swearing.
Compare (but would not overlap with) Verbal Tic, Precision F-Strike.
In the Flash movie Brawl Taunts 2, a Hollywood Nerd comments how it would be cool if Cloud from Final Fantasy VII had appeared in SSBB. He's swiftly beaten down, and Ike refuses his pleas for assistance:
Death Note: The Abridged Series by Team Dattebayo uses this in a famous line for most watchers of the series: "It's time to d-d-d-d-d-d-d-die... bitch!"
Many, many times in A Very Potter Musical, with perpetrators ranging from Molly Weasley to Voldemort himself.
The title character in Happy Gilmore throws down with Bob Barker during a celebrity pro-am golf tourney.
Happy:(thinking he's just won the fight) The price is wrong, bitch! Bob Barker:(after laying Happy out with a swift kick to the face)Now you've had enough... bitch.
The Running Man: "What's the matter now, BITCH!? Why aren't you laughing..!?"
In the film version of Rent, the actor playing Collins improvised the line "Merry Christmas, bitches!" upon entering the apartment with Angel on Christmas morning.
In Easy A, when Brandon runs away, he leaves his parents a note that says, "I'm gay, bitches!"
In Donnie Darko, Donnie calls his mom "bitch" in the subtlest and calmest way ever:
Donnie: Then why don't you start taking the goddamn pills, (pause) bitch? Donnie's mom: Our son just called me a bitch. Donnie's dad:You're not a bitch. You'rebitchin'... but you are not a bitch.
Simon: It's an inaccurate fact, I did some research. There are now almost 10 million bicycles in Beijing... bitch.
"I'm Rick James, Bitch!" from Chappelle's Show, and a lot of Chappelle's jokes in general. He uses this to great effect, and may have lead to a recent upswing in the use of this trope.
Shouted out (literally) by Wayne Brady in another skit where he took Chappelle on a ride... after he kneecaps Dave with a gunshot. "I'm Wayne Brady, BITCH!!"
From Michael to Dwight on The Office: "Hug it out, bitch."
On Saturday Night Live, any conversation Tracy Morgan holds with Lorne Michaels is likely to end with the former demanding, "Get me a soda, bitch!"
Dave, a contestant on season one of reality cooking show Top Chef, reached the height of reality TV popularity after telling another contestant Tiffani "I'm not your bitch, bitch!" in response to endless haranguing by the latter.
X-Play: Morgan Webb's tagline on a commercial about her visiting conventions in Japan: "Konichiwa, bitches."
X-Play's coverage of G-Phoria one year featured Ratty sneaking into the awards by jumping off a nearby building. This action was accompanied by "Geronimo, bitches!"
Another from Ted when he wanted to comfort Robin and she didn't want any...
Robin: Well, then, you're fired.
Ted: You can't fire me. I'm union, bitch!
As well as Lily's "You just made the list, bitch!"
How about Barney speaking French? "Parce que j'ai le jeu, mes chiennes. Translation? Cos I got game, bitches!"
That doesn't quite meanwhat he wanted. "Chiennes" literally means "female dogs." If he wanted "bitches" in the slang sense, he should have used "salopes" or "garces" depending on personal preference.
Wanda Syke's "I'ma Be Me" had her saying "Yeaaah... Obama, bitch!"
Modern Family: "See, we're all going to get past this and be friends again, and this was all set up by me, Mitchell, who is not a mummy's boy but is instead a insightful and considerate person, so make a note bitches!" in episode 4.
From a sketch/interview on The Soup where Zachary Quinto kicks Joel McHale: "Who's Sylar now, bitch?"
In Series/2BrokeGirls, when the diner is held up by a robber in a suit, Han, in a rare badass moment for him, pulls a gun on the robber, delivering one of these.
Han: You're in MY house now, Bitch!
Elizabeth once disguised herself as Amelia and walked into Amelia's house yelling: "I'm your worst nightmare! I'm a motherfucking crossdressing lesbian Jew, BITCH!!" in That's Just Me. However, is most versions of this episode, the line is censored, changing it into: "I'm your worst nightmare, because I'm a crossdressing tomboy, man!"
Okay, so they'll censor that, but NOT any of the characters' foul mouths, all of the fanservice/nudity scenes, OR any of the mental illness jokes?
They also joke a lot about suicide, even though the main character almost committed it in an earlier episode.
Perhaps they censored it because Elizabeth ISN'T religious? The episode was called 'I Don't Wanna Cut My Hair! What Happens When Elizabeth Crossdresses' and it was in the 6th season.
From Spartacus: War of the Damned, when warrior-woman Saxa is confronted by two large gladiators who want to kill some prisoners entrusted to her by Gannicus...
Donar: "I do not see Gannicus among you. No cause to heed his bitch." *Attacks. Ends up with Saxa's knife at his throat and his buddy on the ground.*
Saxa: "I give cause, bitch."
In season 1 of Top Chef, Dave told Tiffany after Restaurant Wars "I'm not your bitch, bitch!"
The WNYC program Radio Lab episode Choice(501) contained an instance of this, subverting the line tagged onto the end of many radio broadcast introductions. "Stay with us...bitches."
"BIIIIIIIIITCH!" is the calling card of Mike Clark, of WRIF-Detroit's drive-time radio show Drew and Mike in the Morning. Callers to the show frequently request Mike "send out a BIIIIIIITCH to the folks working at (insert company name here)."
Stand-Up Comedy, Bitch!
Inverted by David Cross, on Bigger and Blackerer: He details a game to play with friends at a restaurant. When talking to the waitress, make the first thing you say be "Yeah, bitch," But in as low-key a manner as possible. Then, be as polite as possible when making your order. The object is to make it so that the waitress won't be sure you called her 'bitch', but would feel uncomfortable asking such a polite person if he did.
"By the way, if you ever have a job where you have to give speeches in front of people, pepper in the phrase 'suck it.' Very empowering. Just be like 'As you can see from our Powerpoint presentation suck it...' And your clients will be like, 'Did he... did he... did he say suck it? I like this guy... he's a go-getter.'"
True Crime: Streets of LA. uses this liberally, but I guess the greatest example is when he finishes off the crime lord who had his father killed over a money laundering scheme. While this could be a bit of a solemn moment, as he watches his father's killer burn to death in a plane crash, he follows it up by saying: "Try Laundering THAT, bitch!"
Duke Nukem: Duke, despite his extreme womanizing, is a Chivalrous Pervert who never insults the objects of his desire. When you hear him confront the female monster Alien Queen and bellow, "I'm gonna kick your ass, bitch!", you know it is on.
Left 4 Dead's new Crash Course DLC has hopeless optimist Louis, of all people, scream "Oh, it's a bitch apocalypse now, bitch!"
Borderlands plays this straight with Roland, the Soldier. Upon scoring a kill with a Critical Hit, he may shout, "Critical, bitch!", or "Critical, biatch!".
Marcus: (after stabbing Myrrah with Dom's knife) You feel that? That's from Dom...and everyone else you killed you bitch!
Batman Arkham City falls into this a few too many times. You will hardly ever hear any other curse word used, leading to several grunts using "bitch" so many times you'd wish they'd just say something else. For major characters, Two Face takes the cake, especially when he's going against Catwoman. Makes you wonder if he knows any other insults.
Tankmen 2: "You should've used the Pythagorean theorem, bitch."
The end of Neurotically Yours' "Caffeine Conspiracy" has Franklin the Star Shmucks peddler warn his superiors over walkie talkie that "The squirrel is on to us." A moment later, he starts another transmission to add "bitch."
Red vs. Blue: Everyone uses Bitch as a punctuation mark.
Webcomics, Bitch!
Dinosaur Comics had a strip about the overuse of the word "bitches", and suggested alternatives like "fellows", "gravy", and "Monterey Jack". Possibly a Lampshade Hanging, since T-Rex is known for exclamations like "Phlogiston, bitches!" and "Live and learn, bitches!"
Most of the guest characters of The Angry Video Game Nerd ("Or do ya wanna play my game, bitch?"). And sometimes the Nerd himself ("Yeah, Super Mecha Death Christ 2,000 B.C. Version 4.0 Beta, bitch.").
Cracked.com has claimed at least once to "own the Internet, bitch."
Read a Book "It's called Speed Stick, bitch! It's not expensive, bitch!"
slowbeef: I— maybe it was, like, how to get a refund... Like, "Don't be afraid to take back your pumpkins." Diabetus: This is an example of a defective product. Here's what you should do in this situation, bitch.
Quinn: Stormy, what time is it? Stormy: Dodgeball time. Quinn: Dammit, Stormy, what time is it? Stormy:(knocks Quinn out with a dodgeball) I said it was dodgeball time, bitch.
Following the Supreme Court decision declaring Barack Obama's healthcare reform law constitutional, DNC executive director Patrick Gaspard tweeted "it's constitutional. Bitches."
In the Terry Tate Office Linebacker ads, the eponymous character would often invoke this after tackling his victim.
