poor white trash vs slang

poor white trash and slang both are nouns.

Word	Noun	Adjective	Verb	Adverb
poor white trash	Yes	No	No	No
slang	Yes	No	Yes	No

poor white trash (noun)	slang (noun)
(slang) an offensive term for White people who are impoverished	a characteristic language of a particular group (as among thieves)
	informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar