whopper Meaning, Definition & Usage

  1. noun a gross untruth; a blatant lie
    walloper.
  2. noun something especially big or impressive of its kind
    whacker.

WordNet

Whop"per noun
Etymology
Cf. Whapper.
Definitions
  1. One who, or that which, whops.
  2. Same as Whapper. since < 1950 the preferred term for whapper, something very large, as a big lie.

Webster 1913