informal vs slangy

informal and slangy both are adjectives.

Word	Noun	Adjective	Verb	Adverb
informal	No	Yes	No	No
slangy	No	Yes	No	No

informal (adjective)	slangy (adjective)
not formal	constituting or expressed in slang or given to the use of slang
used of spoken and written language
having or fostering a warm or friendly and informal atmosphere
not officially recognized or controlled