Answer: sulks

AnswerCrossword Clue
SULKS

Is a sore loser, maybe

SULKS

Mopes

SULKS

Gets grumpy

SULKS
Broods
SULKS
Pouts
SULKSIs in a pet
SULKSBehaves broodingly
SULKSGoes off in a pout
SULKSDisplays petulance
SULKSIs sullen and silent
SULKSGrumps
SULKSBroods silently
SULKSPouts.
SULKSNurses a grievance.
SULKSBecomes morose.
SULKSMiffed state
SULKSMulligrubs
SULKSBehaves sullenly
SULKSDisplays displeasure
SULKSStews
SULKSIs moodily silent
SULKSIs a sore loser, say
SULKSMakes a pouty face
SULKSActs the mope
SULKSPouts peevishly
SULKSDisplays displeasure, in a way
SULKSActs offended
SULKSIs a poor loser
SULKSIs a bad loser