two-finger salute
A gesture with the thumb, index and middle fingers extended and raised in front of the head as a form of saluting.
There is another gesture called "two-finger salute", which is used mostly in Britain and other countries of the British Commonwealth and is an inverted version of the v-sign with the palm of the hand facing towards the one using the gesture instead of away from him. It is considered the British (Commonwealth) version of the middle finger.
Not to be confused with kuji-in, various ninja gestures that may involve extending the first two fingers, but not as a salute.