colloquialism vs dicky-bird

colloquialism and dicky-bird both are nouns.

Word	Noun	Adjective	Verb	Adverb
colloquialism	Yes	No	No	No
dicky-bird	Yes	No	No	No

colloquialism (noun)	dicky-bird (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech	small bird; adults talking to children sometimes use these words to refer to small birds