ˈbull ˌsession BrE AmE noun [countable]
American English informal an occasion when a group of people meet to talk in a relaxed and friendly way:
an all-night bull session
ˈbull ˌsession BrE AmE noun [countable]
American English informal an occasion when a group of people meet to talk in a relaxed and friendly way:
an all-night bull session
Longman Dictionary of Contemporary English. Longman - Словарь современного английского языка. 2012