backside vs flipper

backside

noun
  • The reverse or opposite of anything. 

  • Used other than figuratively or idiomatically: see back, side. 

  • The back side of an estate: the backyard and outbuildings behind a main house, especially (UK dialect, euphemistic) an outhouse. 

  • A person's buttocks. 

adj
  • Used other than figuratively or idiomatically: see back, side. 

  • Approaching an obstacle backward 

flipper

noun
  • Someone who flips in any other sense, for example throwing a coin. 

  • Television remote control, clicker. 

  • A type of ball bowled by a leg spin bowler, which spins backwards and skids off the pitch with a low bounce. 

  • A flat lever in a pinball machine, triggered by the player to strike the ball and keep it in play. 

  • A kind of false tooth, usually temporary. 

  • A small flat used to support a larger one. 

  • Someone who flips, in the sense of buying a house or other asset and selling it quickly for profit. 

  • In marine mammals such as whales, a wide flat limb, adapted for swimming. 

  • A flat, wide, paddle-like rubber covering for the foot, used in swimming. 

  • A kitchen spatula. 

verb
  • To lift one or both flippers out of the water and slap the surface of the water. 

How often have the words backside and flipper occurred in a corpus of books? (source: Google Ngram Viewer )