With violent abruptness.

Množina: whams

1. A solid blow
2. The loud sound of a hard impact

1. To propel, strike, or beat so as to produce a loud impact
2. To hit or explode with a loud impact

Množina: wham-bangs

Množina: whames

Singular of whammies is whammy.

Množina: whammies

1. A supernatural power bringing bad luck
2. A magic curse or spell; jinx, hex
3. A potent force or attack; specifically; a paralyzing or lethal blow

Singular of whams is wham.