colloquialism vs party pooper

colloquialism and party pooper both are nouns.

Word	Noun	Adjective	Verb	Adverb
colloquialism	Yes	No	No	No
party pooper	Yes	No	No	No

colloquialism (noun)	party pooper (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	someone who spoils the pleasure of others