When the burning remains of a joint or blunt containing cannabis are left to smolder in the ashtray instead of being extinguished, it has been tipped to Bob (Marley)
Stoner1: Anyone want to hit this roach? It's getting pretty short..
Stoner2: We're good man, just tip it to Bob.
Stoner2: We're good man, just tip it to Bob.
by DangerMonkey June 28, 2009