The guinea pig 

A sexual act where the female fellates the male with the male's penis deep in her throat. The male then proceeds to punch the female in the stomach so that the female gags and makes squeaky noises simular to that of a guinea pig.

Anne walked weird all day, I'm sure she and Bill did the guinea pig last night and it still hurts.

The guinea pig by BigNerd9000 June 28, 2017

Feeding the guinea pig 

A german way of saying to shag someone's girlfriend when the other person's streaming

Alright guys, I'm gonna be feeding the guinea pig soon,brb.

Feeding the guinea pig by DonnyDucky September 27, 2017

Charlie the drunk guinea pig 

A character created by Smosh (Ian Hecox and Anthony Padilla) who is a british guinea pig and is often drunk. He has his own twitter and answers questions. And he's pretty fucking awesome. YA POOFS!

Dude 1: Hey, did you see this week's Smosh episode? It had Charlie the Drunk Guinea Pig!

Charlie the Drunk Guinea Pig: Shut up and get me some booze, ya poof!

Charlie the drunk guinea pig by SneakersGirl July 10, 2010

The Ecuadorian Guinea Pig 

The act of a male rimming a female that is on all fours while proceeding to finger her, resembling the manner in which one would eat a guinea pig in Ecuador.

"hey, how was Ecuador?"
"Good, I gave this prostitute The Ecuadorian Guinea Pig.

The Ecuadorian Guinea Pig by ....that one guy January 13, 2014

theguineapig 

The one who is usually getting his ass kicked at whatever it is he may be doing.

Maybe someday theguineapig will stop sucking so hard and actually pull off a victory? naw...

theguineapig by iggitychin August 18, 2009