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.
by DJ Dstar February 16, 2009
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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
by saltydawg12 May 27, 2011
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