A euphemism for a girls period. "Angry pants time" is the time when a girl is usually more irritable than others and has a tendency to be "angry" often.
#1: Man, Carly's being a real bitch lately.
#2: Yeah, she has, must be angry pants time.
A pair of pants that are horribly uncomfortable to the point where anyone wearing them is grumpy for the rest of the day. Angry pants can only affect certain people.
When you have to pee in a movie but don’t want to miss anything, and must do the following mental equation: will the amount I have to pee cause enough discomfort to diminish my attention capacity for the remainder of the movie to an extent which is greater than the amount of the movie I would miss by making a mad dash to the restroom.
I saw Satantango last night, wonderful film but by the 5th hour I had to start doing pee calculus.