What is Screamin' Jimmy?
1.
Slang for a diesel engine manufactured back in the day by GM Diesel (later known as Detroit Diesel, later known as MTU). They were "screamin'" because they were loud, and "Jimmy" being casual slang for "GM." (Also known as "Jimmy Diesels.")
My job in 'Nam was to make sure them Screamin' Jimmys kept screamin' on the patrol boat, otherwise we'd have been sitting ducks for the vietcong.
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1.
when one person from a group of people is sent to the bar to buy multiple beers so as to avoid everyone having to tip on their own purch..