"Funky" is an adjective but it is it a particular type of adjective? It's certainly not comparative or demonstrative. I have looked it up but all I can find is that it is an adjective.
Depending on how it is used, it is either an attributive or a predicative adjective.
It is an attributive adjective if it is used as: a funky X.
It is a predicative adjective if it is used as: X is funky.
Further reading: Oxford Dictionary on attributive and predicative adjectives.