whack
1. whack \'hwak, 'wak\ vb [prob. imit.] 1a: to strike with a smart or resounding blow 1b: to cut with or as if with a whack : CHOP chiefly Brit 2: to get the better of : DEFEAT : to strike a smart or resounding blow - whack.er n 2. whack n 1: a smart or resounding blow; also : the sound of or as if of such a blow 2: PORTION, SHARE 3: CONDITION; esp : proper working order 4a: an opportunity or attempt to do something 4b: a single action or occasion