give someone the finger
US /ɡɪv ˈsʌm.wʌn ðə ˈfɪŋ.ɡər/
UK /ɡɪv ˈsʌm.wʌn ðə ˈfɪŋ.ɡər/
1.
to make an obscene gesture at someone by pointing the middle finger upwards as a sign of contempt or anger
:
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The angry driver decided to give the other driver the finger after being cut off.
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It's rude to give someone the finger.