The seat behind shotgun in a car as a reference to his suicide
Guy 1: I call shotgun!
Guy 2: I call kert Cobain!
A Kurt Cobainer is a sex act where during a rimjob, the receiver of said rimming fires a spicy shart into the mouth of the rimmer.
Last night I was at Rebecca's and she gave me a Kurt Cobainer, she was drinking milk for an hour after