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.
by BigNerd9000 June 28, 2017
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Guinea Pig

A person used to cash fake checks. The person is usually given a very small amount of money for their part in the scheme. At the same time, the Guinea Pig takes all the blame if caught since they are the ones on camera and the fake checks are typically made with the Guinea Pig's real name. Since the person knew they were committing a crime in the first place, they can't go to the authorities to report the real culprits for fear of getting caught.

Usually poor, young, ignorant girls are targeted and coerced into committing the crime. Sometimes, the scheme is carried out similar to a scam email where the victim legitimately thinks the check is real and they are helping another person in need. However, even if the person is unaware they are trying to cash a fake check and they get away with the money, the bank or institution who cashed the check has the person's name and will charge the person for the amount they cashed out. This will ruin the person's credit and get the person banned most large banks for life. Also, if the victim tries to report the scam, there is a low chance the authorities will believe the victim since it's hard to prove they didn't know the check was fake.
She was given 2 years in prison for her part as a guinea pig in a scam.
by slang4today August 15, 2015
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Guinea Pig

It's just a giant fucking hamster.
Guinea Pigs are just larger versions of hamsters.
by KillerFletch January 15, 2015
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Guinea Pig

A reverse-cougar. A younger dude who hits on older chicks.
Little Boy: Hey baby what's shakin?
Teenage girl: Get away from me you're such a guinea pig!
by buttonsmcgee January 06, 2010
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guinea pig shots

The act of holding one's beveridge above one's head and against a wall. Then tilting the drink back and proceeding to suckle the liquid from the container as a guinea pig would water from its water bottle.
I blew so many chunks last night from all the guinea pig shots we were taking; it was a wild night.

"Dude! Guinea pig this Burnett's with me! Go Deacs!!!!"
by undiscoveredbum June 12, 2013
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guinea pig fart

Vaginal flatulence that is an emission or expulsion of air from the vagina, the sound is comparable to a wet fart, emitting a foul smell.
And then she let out a guinea pig fart and it was her pussy screaming that it was dying!
by Jaybird3284 June 18, 2018
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guinea pigs

sex toys that wont shut the fuck up. Squeaking little motherfuckers
won't make it fun tonight.
yeah, let's use a guinea pigs.
by ffffffffffu August 30, 2018
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