"shaven head"...a hairstyle in some way?

It's a hairstyle only in the negative sense, but a hair weave uses someone else's hair so who's to know which? And besides which, it's more a technique to make it look like you've got more hair than you really do and can be incorporated into any number of hair styles.

Gaffe is only one word but still has only one definition (at least according to M-W on line) so it's parbly the answer. Cleave and cleave notwithstanding.