A mustache you gain from the foamy goodness of a guinness beer, or Something a guinea pig might have
Look at that guys guine stache, he must love that beer!

Look at that cute guinea pig his stache makes him look so much cooler!
by Zombie25 June 24, 2010
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The thick, tarry, difficult to excrete stool that you try to push out the morning after a night on the Guinness.
Fucking hell, that Guinness buttplug just pushed one of my piles out!
by Fishfishfishhh November 12, 2018
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A guin is a human-penguin hybrid. Guins are fiercely protective of other guins and commonly place the welfare of non-guins far below their own kind. Guins also deny the existence of guins and in outside conversation will treat them along the same lines as the loch ness monster, bigfoot, extraterrestrials or the mafia.
by CFishbone July 28, 2023
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The book which is actually just a website or it would have reached Mars by now, contains world records. Some of them are crazy, some are weird, some are crazy weird. But it's great to know that if I ever become the first person to eat eggs out of some sort of weird shit, my name gets put in an imaginary book to get me some fame.
TommyInnit: Hey I just got the most followers for a Minecraft Twitch Channel.
Also TommyInnit: Won't stop bragging about cuz its the GUINNESS BOOK OF WORLD RECORDS duh.
by I_hasAcat June 5, 2022
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when your trying to convey that something you did was 100% true.
yes I'm high right now on Guinness bro.
by lifeoftristan November 6, 2022
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The act of passing diarrhea, usually whilst travelling abroad.
"How was Gary this morning?"
"Oh, not too flash, he was on the shitter all night, pouring a Guinness well into the wee hours
by Gruntie Stevie October 25, 2020
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I love Guinness, no matter the definition. Lowest in calories. Forget the sugar. Slainte
by Guinness lassie February 28, 2021
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