The act of going to the toilet when you don't really need to, to make sure you don't need to go later. Usually conducted prior to long car journeys or departure from drinking establishments.
Her:"lets leave this pub before your too drunk to leave"

Him:"OK, but I need to take an insurance piss first"
by SuperBeerFiend May 7, 2009
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Previous to the act of masturbation, an Insurance Piss is the act of urinating immediately after the primary finish. This is to ensure that the individual can avoid cleaning up his Second Wind. (See Second Wind).
Paul was tired of cleaning up his Second Wind, so he began trying an Insurance Piss. This way he could pee and not worry about a secondary clean up.
by The Crawling King Snake March 7, 2014
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When you see a bathroom and don't really have to pee, but you should probably try anyway just in case it's a while till you find another one.

Please note, an insurance piss is one of the only 2 types of pisses, the other being the 'monstrous piss.'
Guy: "Heyo, I see a restroom over there. Hold on, I'm gonna take an insurance piss real quick."
Other guy: "Good call, I gotta take a monster anyway."
by monicaheddneck September 17, 2023
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