Top Definition
peeing/ urinating very fast or swiftly because-
1) you are in a hurry coz ur fav T.V. show has started
2) loo smells bad
3) someone else has to use the bathroom

normally people take a fast piss because of the 2nd reason.
hey man, your loo smells so bad. First, i decided not to go in there but it was urgent so i took a fast piss.
by sudanny October 23, 2009

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