whap whap /wɑːp/

verb

1. [Informal, N. American] Hit hard  ( bash [Informal] , bonk [Informal] , bop [Informal] , belt , sock [Informal] , wham [Informal] , whap [Informal, N. American] , whop [Informal] , boink [Informal, N. American] , wallop [Informal] , whack [Informal] )
   hit hard
    The teacher whacked the boy
   The teacher whacked the boy