[whack] vb [prob. imit. of the sound of a blow] vt (1719) 1 a: to strike with a smart or resounding blow b: to cut with or as if with a whack: chop
2. chiefly Brit: to get the better of: defeat ~ vi: to strike a smart or resounding blow -- whack.er n
[2]whack n (1736) 1 a: a smart or resounding blow; also: the sound of or as if of such a blow b: a critical attack
2: portion, share
3: condition, state
4. a: an opportunity or attempt to do something "take a ~ at it" b: a single action or occasion "borrowed $50 all at one ~" -- out of whack 1: out of proper order or shape "threw his knee out of whack"
2: not in accord "feeling out of whack with her contemporaries --S. E. Rubin"