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Pissing in the sink instead of the toilet. An act which saves water and is therefore good for the planet but enrages women purely because they can't do it due to their defective chromosomes, causing them to make ridiculous claims such as "it's disgusting" when we all know that urine is sterile as it leaves the body.
"You better not be doing a sinkpiss again!"

"I pay the water bill bitch so until you let me put a urinal in the bathroom I'm sinkpissing!"
sinkpiss by Mr. Cardboard October 30, 2011
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I started playing cricket for my local pub. It's just an excuse to sink piss.
sink piss by Oyml February 7, 2007
Related Words

Sinkissed 

That special glow you end up with the morning after a night of debauchery
Dude, must have been a good night, you're looking pretty sinkissed.
Sinkissed by Atl2Lga January 22, 2009

Sinkpisser 

A Sinkpisser
(Also referred to as an 'outside the box thinker')

is a man who's distinguished by his bold decision making ability under pressure.
Where one man see's a bathroom full of taken stalls and empty sinks,
Joseph a veteran sinkpisser saw opportunity.

Sinkpisser 

One who is boorish, thoughtless, unsophisticated and ill-mannered. So ill-mannered, in fact, that they lack the courtesy to wait for an available urinal or commode, and instead elect to micturate in the fucking sink.
Christ, who invited that sinkpisser to the party? Last time he came here, he ate all the buffalo wings and wiped his hands on the curtains, right after he put his cigarette out on the cat.
The act of being too lazy to walk to the bathroom and to choose to piss in the sink in your dorm room.
Fuck it, I'm ripping a sink piss.
Sink Piss by Edawg1290 October 21, 2025