Usually refers to a inconspicuous bolt hole in a high street which is ideally situated for the drunk needing to empty his full balloon-like bladder......quicky.
Rob - "Man, I'm gonna piss my pants soon - I need to find a slash point quick"

Steve - "What about behind that skip next to W H Smiths ....Make sure you shake it well after, otherwise you'll end up with an inch of piss down your jeans"
by Polenzo June 02, 2009
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