bull session

noun

Informal.

1. an informal, spontaneous discussion.

bull session

noun

1. informal,  an informal discussion, often among men

Word History and Origins

Origin of bull session¹

First recorded in 1915–20

Word History and Origins

Origin of bull session¹

C20: from _bull ²

Idioms and Phrases

An informal discussion, as in College students love late-night bull sessions about anything and everything, from professors to poetry to politics. This expression originally referred to an exchange of opinions and anecdotes, including stories of sexual prowess, by men, and then came to be used more broadly. [Slang; c. 1915]