fall off the roof 

to start one's period

Jack: Hey man, you get some from Francine last night?
Harold: Nah, man. Jovie had to fall off the roof on Monday so none this week.
Jack: At least she ain't pregnant, yo!

fall off the roof by G. Wells July 21, 2008

fall off the roof 

when a woman starts her period

Jack: Hey man, you get some from Francine last night?
Harold: Nah, man. Jovie had to fall off the roof on Monday so none this week.
Jack: At least she ain't pregnant, yo!

fall off the roof by G. Wells April 14, 2006

fall off the roof 

v. to sleep with someone.

Other forms: falling off the roof, roofing, roofer (one who falls off the roof)

Hey, wanna go fall off the roof?

Don't you know Joe and Anna fell off a roof together?

Erin is such a roofer.

fall off the roof by M. Mills October 22, 2008