I DESPERATELY need the word. I know there's audacious. I also know it's not colloquial. I need an adjective from the everyday, regular English that would mean arrogant / audacious / bold in the sense that somebody alwawys gets their way but in an inconsiderate manner.

Something like:
"She's so ... INSERT THE WORD THAT WOULD MEAN AUDACIOUS / BOLD IN A NEGATIVE WAY"

I know there's this:
"She's got quite a nerve!"

See, this is perfect but it's not an adjective. I need the same quite a nerve thing but as an adjective that's used in everyday speech, not something too intelligent like audacious/arrogant. Or at least please let me know that native speakers don't have an everyday word for that and use other ways to say it and pleaseeee. I'm an American English teacher and my beginner students ask for the adjective and I feel too fake giving them an advanced word while I'm pretty confident there's a simpler one out there.