/hwam, wam/ , n., interj., v., whammed, whamming , adv.
n.
1. a loud sound produced by an explosion or sharp impact: the wham of a pile driver.
2. a forcible impact.
interj.
3. (used as an exclamation suggestive of a loud slam, blow, or the like).
v.t. , v.i.
4. to hit or make a forcible impact, esp. one producing a loud sound: The boat whammed into the dock. He whammed the door shut.
adv.
5. Also, whammo . abruptly; with startling suddenness: The car ran wham up against the building.
[ 1730-40; imit. ]