#1.
Using the bathroom.
#2.
Alternate phrase for "smoking a joint." Used when the "authorities" are around, as a
discreet way to let fellow stoners know what
you just did/are going to do, because it sounds like #1 to
virgin ears.
1.
I went
downstairs after hitting the john.
2.
MOM: What were you two doing?
KID 1: We were hitting the john!
KID 2: Yeah!
KID 3: (
laughs)