Answer:

sorehead

Answer	Crossword Clue
SOREHEAD	Poor loser
SOREHEAD	Grump
SOREHEAD	Bellyacher

SOREHEAD	Unsportsmanlike sort
SOREHEAD	Touchy type
SOREHEAD	Bad loser
SOREHEAD	Disgruntled person
SOREHEAD	Disgruntled politician: Colloq.
SOREHEAD	Disgruntled loser: Colloq.
SOREHEAD	Poor loser: Colloq.
SOREHEAD	Disgruntled guy.

SOREHEAD	Unsportsmanlike loser
SOREHEAD	Grudge carrier
SOREHEAD	One with a short fuse
SOREHEAD	Peeved person
SOREHEAD	Poor sport