Robert Pattinson — Grabbin’ a Handful of Booty

Twihards, prepare to be extremely jealous of FKA Twigs … Robert Pattinson is showing solid PDA with his new chick — grabbing a heaping handful of her cheeks.

The well-known couple went to lunch Friday in L.A. and Edward proudly squeezed his new moon.

Still doesn’t defense his new haircut … but we’re guessing Twigs likes the doo — and it probably helps RPatz play grab…