Etymology

whammo

W4H4A1M3M3O1

Today it means: Used to emphasize the suddenness of an event. Full definition →

English oh ← Middle English o ← Old French oh
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The story

  1. Englishwham
  2. Latinō
  3. Old Frenchoh
  4. Middle Englisho
  5. EnglishO
  6. Englishoh
  7. English todaywhammo

From wham + -o.

Etymology from Wiktionary, CC BY-SA 4.0.