Answer: actsup

AnswerCrossword Clue
ACTSUPBehaves playfully: Colloq.
ACTSUPDevelops a glitch
ACTSUPStarts malfunctioning
ACTSUPIs a brat
ACTSUPGoes on the fritz
ACTSUPMakes a scene
ACTSUPIs difficult.
ACTSUPMisbehaves.
ACTSUPIs playful: Colloq.
ACTSUPIs ornery.
ACTSUPPlays pranks.
ACTSUPMisbehaves
ACTSUPCarries on
ACTSUPGoes haywire
ACTSUPEarns a time-out, perhaps
ACTSUPMakes like a brat
ACTSUPBehaves willfully
ACTSUPElicits a scolding
ACTSUPIs bratty
ACTSUPMalfunctions
ACTSUPBehaves like a brat