oddball
[noun]
Synonyms: eccentric, case, character, duck, oddity, original, quiz, spook, wack, zombie
[adjective]
Synonyms: strange, bizarre, curious, eccentric, idiosyncratic, odd, outlandish, peculiar, queer, weird

[TahlilGaran] English Synonym Dictionary ▲

odd‧ball /ˈɒdbɔːl $ ˈɑːdbɒːl/ noun [countable] informal
someone who behaves in a strange or unusual way Synonym : eccentric
—oddball adjective:
a rather oddball sense of humour

[TahlilGaran] Dictionary of Contemporary English ▲

oddball
n., slang, informal An eccentric person; one who doesn't act like everyone else.
John is an oddball
■ he never invites anyone.

[TahlilGaran] English Idioms Dictionary ▲