pull the leg of vs slang

pull the leg of is not a noun while slang is a noun.

Word	Noun	Adjective	Verb	Adverb
pull the leg of	No	No	Yes	No
slang	Yes	No	Yes	No

As verbs, slang is a hypernym of pull the leg of; that is, slang is a word with a broader meaning than pull the leg of:

Other hypernyms of pull the leg of include befool, cod, dupe, fool, gull, put on, put one across, put one over, take in.

pull the leg of (noun)	slang (noun)
	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

pull the leg of (verb)	slang (verb)
tell false information to for fun	abuse with coarse language
	fool or hoax
	use slang or vulgar language