1) Acts all emo 2) Acts offended 3) Acts the mope 4) Behaves broodingly 5) Behaves sullenly 6) Broods 7) Displays displeasure 8) Displays petulance 9) Gets grumpy 10) Goes off in a pout 11) Huffy states 12) Is a bad loser 13) Is a poor loser 14) Is a sore loser 15) Is a wet blanket 16) Is in a pet 17) Is moodily silent Found on https://www.crosswordclues.com/clue/sulks