Guinnessing

The act of ejaculating on a females head to make her look like a pint of Guinness

Barrington - Oi fam did you smash that Irish ting last night?
Ramraj - Yeh bruhh, I gave her a proper Guinnessing
Barrington - A what?! :/
Ramraj - You don't know shit!

by Assfinger9000 November 22, 2016