to show one's middle finger to another person to show complete disdain for them; also called flip off
(also flash the bird, fly the bird, flick off, flip off) To make a contemptuous sign with the hand, middle finger extended; GIVE someone THE FINGER: The six ladies flipped the bird to all their earthling viewers, lifting their minis/ He's like the jerk who whips around traffic, flashing the bird as he passes/ How did it feel to you when Mr Harrington stared you down and flipped you off in that manner? (1980s+ Students)