Wiktionary
vb. (context transitive English) To make a rude or obscene gesture at someone.
Usage examples of "flip off".
If it were me in love with your sister, Bobby, you better believe I would have told you to flip off days ago.
Watching from behind the two-way mirror in the Security Command Center control booth, Tristan was forced to flip off the hidden microphone and close his eyes, no longer able to bear her fierce and unyielding beauty.
Elmore had to hit the brakes then, and Rydell saw Chevette flip off.
Everyone applauded in agreement, and Orion reached over to flip off the holo.
We'd take out the island and flip off the deck in flames, remember?
The rabbit did a flip off the car in an explosion of fake fur and landed in a crumpled heap at the side of the road.
Cian saw her flip off, shooting stakes from both hands before the haze buried her.
Again he shoved off, and with one final bounce-and-flip off the far wall, he landed safely on the ground at the base of their building.