analogous to "taking a piss". This phrase was used in the Season 3 Premiere of "Turn: Washington's Spies". Seems like a colloquialism of the late 1700s.
"Excuse me, I have to take a slash."
by BruinMBA June 18, 2017
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Act of urinating, or taking a slash after many beers with your mates
Man 1 "hey iv had to many beers, i need to take slash"
Man 2 "pussy broke the seal now hes taking a slash
by ss123 February 11, 2014
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