A Dirty Sampson is an action where one scratches their crotch then offers the next person they encounter a handshake
Person: Hey Nathan, Willie totally just gave Jacob a dirty a Dirty Sampson..
Nathan: That's just wrong man, Willie has a bad Dirty Sampson addiction.
Nathan: That's just wrong man, Willie has a bad Dirty Sampson addiction.
by THEnerdyGUY February 13, 2017