Pronunciation: (hwam, wam), [key]
—n., interj., v., whammed, wham•ming,
1. a loud sound produced by an explosion or sharp impact: the wham of a pile driver.
2. a forcible impact.
(used as an exclamation suggestive of a loud slam, blow, or the like).
to hit or make a forcible impact, esp. one producing a loud sound: The boat whammed into the dock. He whammed the door shut.
Also,whammo.abruptly; with startling suddenness: The car ran wham up against the building.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.