flip off
phr. v..phr. v.. to show someone your middle finger as a rude way to say you are angry with them.
phr. v.. to perform an obscene gesture by extending the middle finger toward someone, typically as a sign of contempt or anger.
The driver flipped me off after I honked my horn.
He got so frustrated with the referee's decision that he flipped him off and was kicked out of the game.
In a moment of uncharacteristic aggression, the politician flipped off the hecklers who were persistently interrupting his speech.
highly informal and considered offensive in most social or professional settings.
this is the American English equivalent of the British 'give someone the finger'; it is a transitive phrasal verb that is almost always separated when using a pronoun.
He flipped off to me.He flipped me off.the verb does not take the preposition 'to'; the person being gestured at is the direct object.