prob stat

Probably. Derived from the abbreviation of probably and the abbreviation of the high school course "Probability and Statistics".

A: Will you be going to the movies?
B: Prob stat, I don't have much homework.

prob stats

a supremely annoying abbreviation for the abbreviation of probs (aka probably); a play off of the class probability/ statistics

Maggie: Are you going to the electric daisy carnival this weekend?

Sam: Prob stats