guillotine 

v. to hide a boner putting your penis in the natural/straight-up position. The penis log is well hidden and unnoticed, but the head exceeds the part where your belt fits...if someone lifts your shirt, they'll see your head saying hi

i had to guillotine my penis so my teacher didn't notice my boner when he asked me to pass up to the blackoboard...

guillotine by Puhercules May 8, 2010

FATAL FLYIN' GUILLOTINE

Secret technique used in both Shadowboxin' and Chessboxin' developed by The RZA

FATAL FLYIN' GUILLOTINE chop off you fuckin' head!

FATAL FLYIN' GUILLOTINE by Ignatius Strangelove December 6, 2007

Chinese Guillotine

This is when a woman is performing oral sex on a man, and right before ejaculation the male thrusts his penis as far down the woman's throat as possible. In reaction to this vile act the woman encloses her teeth on the penis and bites it off.

Dude, why are you crying?
Because last i got a chinese guillotine and I am in pain.

Chinese Guillotine by Vp's Finest November 6, 2010

Guillotine 

The act of squatting over one's anus and lowering your scrotum into the open orifice. Your partner then proceeds to clench their anus closed once the testicles are inserted. Thus, simulating the function of the well known, French guillotine. The anus is the "blade" and the semen is the "blood" after said "artificial execution".

"I was feeling a little historical last night, so I made my girlfriend give me the guillotine"

Guillotine by Butt Funk May 3, 2009

nigger guillotine 

cuts off the head of niggers

use the nigger guillotine

nigger guillotine by slaveowner123 May 14, 2021

guillotine rub 

when a person with dentures takes them out then performs fellatio

guillotine rub a is blowjob from a person without any teeth

guillotine rub by rr879 April 19, 2014

Bathroom Guillotine 

When a male goes to the bathroom to urinate and does not remove his belt, so he unzips his pants and sticks his penis through the opening through the front of the boxers and through his zipper opening.

"Dude i went to the bathroom and i was about to zip up my pants, then i stopped myself before i gave myself a bathroom guillotine!"

Bathroom Guillotine by Redsxfan34 April 19, 2010