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2.
the act of urinating in an inappropriate/unnecessary location whilst participating in anti-social behaviour
i.e:

Man 1 - Are you going for a piss?
Man 2 - Yeah, why?
Man 1 - Do you want a regular piss?, or a FUN PISS?
Man 2 - ... a Fun piss clearly..?

(man 1 takes man 2 down a dark alley, into someone's balcony area of a hostel)

man 1 - Piss there

(Man 1 starts to piss whilst a dirty mongrel walks into his stream)
by SotonUni April 23, 2010

Words related to Fun piss

dog fun piss
 
1.
The act of urinating in an inappropriate/unnecessary location for one's own amusement, whilst participating in anti-social behaviour.
Guy 1: I just had a fun piss on a dog.
Guy 2: Well I just had a fun piss off the roof of my hotel, beat that
by Ihavenoideawhoyouare April 23, 2010