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1 definition by Bitch Session Blog

 
1.
A time dedicated to complaining, griping, bitching, moaning, and gnashing teeth. Generally a group activity, in which the participants complain about one evil or annoying person, or about their respective S.O.s, ex-S.O.s, families, professors, bosses, etc. The name derives from the verb "to bitch" as in "to complain loudly and profanely", not from the noun "a bitch", thus the participants may be male as well as female.
"Looks like Jim and Bob are over by the water cooler having a bitch session about the price of Gasoline."
by Bitch Session Blog July 20, 2008