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1.
An Italian, esp. an Italian Male
I was talking to Vince the other day and he said his parents were Polish. Waddya kiddin' me?? He's from Italy! He's a Pisan!

by Ryan_W July 07, 2006
 
2.
A friend, esp. of Italian descent.
" Ey Paulie! Is this your Pisan?" "Yes, I know this man." "Well tell this prick to leave."

Paulie guido wop jersey jersey boy
by Natestical May 21, 2010
 
3.
To take a shit.
I just took the biggest pisan!
by The littlest Gnome in the game February 29, 2012