Guinnesswine 

Guinnesswine is the nectar of the gods. Able to give any mortal human the power to achieve anything they so wish

Ah mate I’m so close to the summit of Everest, best drink some Guinnesswine so I can get there

Guinnesswine by MasterEvski November 8, 2019

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!

Guinnessing by Assfinger9000 November 22, 2016

Guinnesscide 

When a beautiful draught of Guinness is spilled.

Don't commit Guinnesscide, hold on tight to your drink.

Guinnesscide by Tepid Darkness July 13, 2015

Guinnesscide 

1) Drinking nothing but Guinness all night, nearly resulting in your death due to the nitrogen shits the next day.

2) drinking all the irish beer in a single bar

3) Consuming five or more Irish Car Bombs, in a single sitting.

Rost: Dude, you just destroyed the bathroom!
Rhett: Yeah, I committed Guinnesscide last night. Sorry

Bailey: Barkeep, I'll have a Smithwicks.
Barkeep: Sorry, but a bunch of kids came in here and committed Guinnesscide. But we have Bluemoon.
Bailey: Fuck Bluemoon

Rhett: When did Drew get so drunk?
Rost: He committed Guinnesscide a while ago.
Rhett: But he's drinking dirty Shirley Temples?
Rost: Yeah, but he had like ten Irish Car Bombs earlier.

Guinnesscide by rhettku March 14, 2011