It is called white death because the person experiencing it is usually very pale to the face & because the person who is experiencing it claims they are dying.
White death is not common with marijuana use, it is usually very common with synthetic drugs such as AM-2201 and JWH-250 found in spice & herbal incense.
SPECTATOR 2: Look how pale his face is!
SPECTATOR 1: Yeah, he threw up about five minutes ago after smoking spice.
SPECTATOR 2: I told him if he smokes too much of that fake shit he would get white death.
Recommended treatment for passing out at a party.
Similar to seagulling but done with a tissue/sock.
Dude 2: You got white deathed my friend.
Dude 2: Did you lick it off?