The greek half-goat god of sex.
A nickname for many people.
When people have pan as a nickname, it normally means they are good in bed.
Dude: IM GOING TO SLEEP WITH THAT GIRL OVER THERE!
other Dude: why?!?
Dude: CUZ HER NICKNAMES PAN!
other dude: DAMN! I WISH I HAD GOT TO HER FIRST!