Celebrag 

To let one's friends know, often through re-tweeting on Twitter, that you have had an exchange with a famous person.

OMG! @LizaMinnelli loves me! RT @LizaMinnelli: @PatheticJackass Please don't send me another picture of your junk. I forwarded the one you sent to the police.

@Truthteller: Hey, @PatheticJackass, stop celebragging.

Celebrag by Coco_pdx May 14, 2011

‘Celebratory’ Assembly

Definition---
An assembly with which to celebrate students ‘achievements’ such as birthdays. –held every Friday afternoon- similar to Mass, but is hosted by a manwho regards himself on par with God like stature, along with a long-haired Science co-ordinator, who, funnily enough, is a bitch; an assembly in which a regimented clap is allowed for a controlled burst of time.

Example---
HT: So let’s have on e round of a happy birthday rendition.
{Terrible piano playing ensues, coupled with the vocals to ‘Happy Birthday’ from children… followed by clapping.}
HT: Right! Nathan! You can go sit outside my office, there was no need for that extra-clap of an outburst.
Teacher: Once again, an excellent and most celebratory, ‘Celebratory’ Assembly

‘Celebratory’ Assembly by Gwendolenalexia July 30, 2012

Celebration Cup 

In beer pong, a cup which each team fills 3/4 of the way up, and then proceeds to place anywhere in their own rack. The opponents turn around when the cup is being placed so that they do not know which cup to shoot at. When during the game either team proceeds to hit their opponents' celebration cup, the team whose cup it is gets to celebrate because, as a result, they get to drink extra! A loud celebration ensues, with all four players taking part--two of them because they hit a cup, and two because they get to enjoy more delicious Natty Light. It is also common courtesy to thank the opposing team for hitting your celebration cup.

"Dude look, they just hit the celebration cup!" (screams of joy ensue)

Celebration Cup by BTfuckinR March 5, 2011

Celebration Parallax 

The phenomenon whereby the exact same set of facts is either celebrated or deplored depending solely on the political bias of the observer.

When a liberal writes that increased immigration is good because it leads to a liberal demographic shift, but then writes that conservatives decrying increased immigration are pushing "replacement theory," that's celebration parallax.

Celebration Parallax by sensei10 January 31, 2023

celebrathlete 

an athlete that has attained celebrity status through either their physical prowess, or their off-field shenanigans.

What's the dispatcher code for "rampaging blonde wacking celebrathlete husband with golf club"?

celebrathlete by sandspit November 30, 2009

Slut celebrating

When you celebrate and encourage a woman’s sexual prowess rather than demeaning her for liking sexual intercourse

Person 1: Abbi loves sleeping with professors on the first date.

Person 2: Why are you putting her down? You wouldn’t if she was a man

Person 1: Oh no you didn’t get it! I don’t have an issue with it, I’m slut celebrating her! She should do it more often.

Slut celebrating by thisbluetacisgrey November 18, 2019

Celebratory Crouching 

An action used commonly in the Halo video game series mainly during online multiplayer player play. Celebratory Crouching is normally seen as several pelvic thrusts/crouching motions into a recently killed halo player to humiliate ones death or to celebrate an unbelievable kill. While many find the action insulting during the game as it is oftenly confused with T-Bagging however it is perfectly acceptable to celebratory crouch on ones face or body in the game.

Dude look at me CELEBRATORY CROUCHING on this guys face!

Celebratory Crouching by hamburgersyum August 22, 2011