sulker

he is such a sulker after losing the game.

don't be a sulker; just accept the outcome.

she tends to be a sulker whenever things don't go her way.

his sulker attitude affected the team's morale.

being a sulker won't help you solve your problems.

after the argument, he became a sulker for days.

she always turns into a sulker when she feels misunderstood.

it's hard to cheer up a sulker in the group.

he is known as the sulker of the office.

her sulker demeanor made it difficult to communicate.