batpoop adjective 1adverb 1forms 2 adjective1 •(slang) Too irrational to be dealt with sanely.It drives me batpoop to know the iPhone is MMS and tethering capable, but AT&T prevents it from being utilized on their network. — 2009 adverb1 •(slang) Used as an intensifier, particularly for insane or synonyms.Alicia Silverstone is upholding the time-honoured tradition of saddling celebrity kids with batpoop crazy names. She’s named her new son Bear Blu. — 2011 formsmore batpoop · most batpoop