A sexual act where you insert your whole arm up the anus of a man/women. Blood is the only lubricant involved. This act usually involves rolling up the sleeves of your shirt. It is also known by a certain cloud of gathers as a NB.
Friend 1 : Yeah, I was Guinea Pigging my wife last night.
when a couple argues real bad all the way home. then they prepare food while still arguing hurting each others' feelings like its nothing. during dinner they chew snaringly and fight over ridiculous stuff like buying 600g of plums instead of 500. then they wash the dishes and tidy up calling each other names ("useless whore", "brainless brick") and insulting families. then they watch the news while threatening to end their relationship, both of them hardening out of delusions of pride, honour, dignity. neither one willing to simply change their perspective for a minute to witness the comedy of their scene.
at five to twelve the couples' two guinea pigs start procreating in their cage facing the bewildered, silenced couple. a lot of wheezing, puffing and blowing, stamping and trampling.
When someone tries to gain social standing or power by using another person as a test subject, pressuring them into doing embarrassing or humiliating things for entertainment or control, usually at the other person’s expense.
He kept daring her to do humiliating stuff in front of everyone just to look cool. That wasn’t joking around — that was straight-up guinea pigging.