/flip"euhr/ , n.
1. a broad, flat limb, as of a seal or whale, especially adapted for swimming.
2. Also called fin . one of a pair of paddlelike devices, usually of rubber, worn on the feet as an aid in scuba diving and swimming.
3. Theat. a narrow flat hinged or attached at right angles to a larger flat.
4. Slang. the hand.
5. someone or something that flips.
[ 1815-25; FLIP 1 + -ER 1 ]