colloquialism vs slap-up

colloquialism is a noun but slap-up is not a noun.

Word	Noun	Adjective	Verb	Adverb
colloquialism	Yes	No	No	No
slap-up	No	Yes	No	No

colloquialism (noun)	slap-up (noun)
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech

colloquialism (adjective)	slap-up (adjective)
	excellent