slang vs can-do

slang is a noun but can-do is not a noun.

Word	Noun	Adjective	Verb	Adverb
slang	Yes	No	Yes	No
can-do	No	Yes	No	No

slang (noun)	can-do (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

slang (adjective)	can-do (adjective)
	marked by a willingness to tackle a job and get it done