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Montréal slang for bank fraude usually involving cashing out big amounts of money. If you're from montreal than you know guiche.
Yo bro send me your guiche we are gonna cashout.
Holla guiche c'est live 5k minimum dont sleep.
Guiche by Pidre Cat October 26, 2020
An ATM in Quebec
I had an additional fee of 3.50 at the guichet when I withdrew 20$
Guichet by aulivermtl March 23, 2009
The guiche is the bit betwixt your asshole and your nutsack. Also know as the perenium in scientific circles
The cheeky bint tickled my guiche
Guiche by Mac October 12, 2004
The area between a mans testicles and asshole.
Guiche by Slice January 29, 2003

Guiche Piercing 

A piercing on the area between the scrotum and the anus.
John thought a guiche piercing would spice up his sex life
Guiche Piercing by evergreen_angel January 26, 2015
The piece of skin that separates a man's anus and testicles.

It is becoming a popular area to get pierced.
"Oh noes! Steve ripped off his guiche by accident!"
guiche by invictus February 19, 2004