Fall off the roof American informal euphemism
If a woman falls off the roof, she menstruates.
Why is Janet so exhausted? Has she fallen off the roof?
If a girl has a little visitor, she is on her period.
A group of beautiful women.
Used to describe a girl or woman who is unattractive
An offensive word used to describe an irritating or unpleasant old woman
Since a period that no one can remember; since the distant past.
The verb "fall" must be conjugated according to its tense.
 
This phrase dates from 1930s.
Completely dark, without any light or color
I'm scared of the basement! It's as black as a skillet!