From Longman Dictionary of Contemporary Englishwhamwham /wæm/ interjection 1 CHITused to describe the sound of something suddenly hitting something else very hard Wham! The car hit the wall.2 SUDDENLYused to express the idea that something very unexpected suddenly happens Life is going along nicely and then, wham, you lose your job. —wham noun [countable]
Examples from the Corpus
wham• I moved slightly, and wham, the bear hit me again. 