BT
n.— «“BT”—from the English slang “bad trip”—is an expression designating a foul mood.» —“Acronyms run amok in Indonesia” by Bhimanto Suwastoyo in Jakarta, Indonesia Mail & Guardian (S. Africa) Aug. 30, 2004. (source: Double-Tongued Dictionary)
Further reading
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The slang term 4-55 air conditioning is means cooling a car by driving fast with all the windows down. This is part of a complete episode.
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