Answer: losesit

AnswerCrossword Clue
LOSESITFlips out
LOSESITBlows one's cool
LOSESITGoes apeshit
LOSESITAbruptly becomes violet
LOSESITExplodes
LOSESITSot lies in a whirlpool and gets mad (5,2)
LOSESITBoils over
LOSESITBlows one's top
LOSESITFlies off the handle
LOSESITGoes bonkers
LOSESITGoes berserk
LOSESITGoes postal
LOSESITGoes crazy
LOSESITGoes ape
LOSESITGoes ballistic
LOSESITComes undone
LOSESITFlips
LOSESITSnaps