Abigail Ratchford -- I Posed For Playboy, Butt ...

Instagram bombshell Abigail Ratchford just did a steamy shoot for Playboy, but if you want to see her bare it all ... you might have to wait a hot second.

Abigail's never posed nude before, but she does bring a lot to the table (yes, we're talking about her boobs) -- so Wednesday in Hollywood ... we had to ask if she's revealing all the goods in her Bunny spread.

Watch ... AbRatch plays it very coy, which is fine since you get to look at her in a very revealing top while she does it.

But here's the truth -- our Playboy-connected sources confirm Ratchford did a "Baywatch" themed shoot, but will NOT be topless or show any frontal nudity. Still, that ass is in play ... we're told.