Usually a fat bowl occurs when you get home from work or more commonly when you return from school, escape the girlfriend/parents.
Bitch-sticks I can't wait to get home and smoke a big fat bowl.
I hear that.
Gave the slip, she's doin' my fucking head in
Well I got a fat bowl for you homes!
Every night when George got home Martha would have a fat bowl waiting for him, soon as he walked in the door.
(inaccurate film reference from dazed and confused"