slang vs kid

slang and kid both are nouns.

Word	Noun	Adjective	Verb	Adverb
slang	Yes	No	Yes	No
kid	Yes	No	Yes	No

As verbs, kid is a hyponym of slang; that is, kid is a word with a more specific, narrower meaning than slang:

Other hyponyms of slang include pull the leg of.

slang (noun)	kid (noun)
a characteristic language of a particular group (as among thieves)	young goat
informal language consisting of words and expressions that are not considered appropriate for formal occasions; often vituperative or vulgar	a young person of either sex
	a human offspring (son or daughter) of any age
	soft smooth leather from the hide of a young goat

slang (verb)	kid (verb)
abuse with coarse language	be silly or tease one another
fool or hoax	tell false information to for fun
use slang or vulgar language