[wham] n [imit.] (1739) 1: a solid blow
2: the loud sound of a hard impact
[2]wham or wham.mo adv (1924): with violent abruptness "everything seemed to be going well, when ~ the deal fell through" [3]wham vb whammed ; wham.ming vt (1925): to propel, strike, or beat so as to produce a loud impact ~ vi: to hit or explode with a loud impact