When one trespasses onto another's property and urinates on the latter's property.
Ladies and gentlemen of the jury, John Smith trespassed onto Cindy McKurskin's property, and then urinated all over her front yard. He, my friends, was therefore trespissing!
by J.D. Arcy February 15, 2009
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The act of urinating on another person's plot of land because there are no other trees to be found on public property.
YTMND Person 1: So I was tresp-ssing on someone's property...

YTMND Person 2: You were Trespissing?

YTMND Person 1: ...
by Satori Lawliet October 23, 2008
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verb. (gerund) Refers to the act of intruding upon another's private property, and then proceeding to urinate all over said property. (as if marking territory)
Willis: I've always wanted to piss on the lawn at the White House. Just look in the windows of the oval office and see the look on Obama's face......

Barnaby: Nah, man, dass trespissing. Secret service'll nail yo' ass.
by karlito gepart August 20, 2011
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The act of pissing on the owner's land or property without permission.
Person 1: Hey bro, didn't you say you had to piss?
Person 2: Yeah I did but I'm all good now, I trespissed on Mr. Smiths lawn on the way here.

Person 1: Oh nice, I should trespiss too sometime.
Person 2: Yeah it saves time and its safer. Definitely try it when you get the chance.
by 14skater14 June 30, 2022
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To urinate illegally on property that doesn't belong to you.
I was walking home from the bar last night and I needed to go so bad, I had to stop and trespiss behind the elementary school.
by Old Janx Spirit August 9, 2012
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