To shan someone is to sexually harass a person in a social setting such as in a club, a
bar, a house
party, ... in an unashamed and perverted fashion. Often done by virgins and closet gays as a way to appear as "playas" in
front of their peers.
Dude I went clubbing with this
douchebag the other day, and he just totally attempted to shan some
girl. She ran away crying and he was like "bro she'
s totally lesbo, she's lucky I even wanted to shan her".