7 letters · 13 points in Scrabble
originUnknown and debated origin. Possibly a shortening of Chunder Loo, itself a presumed rhyming slang for spew (said to be derived from the cartoon character “Chunder Loo of Akim Foo”, drawn by Norman Lindsay for a series of boot-polish advertisements in the early 1900s), but the rhyming slang usage is not actually recorded. Alternatively, possibly from the nautical phrase "*Watch under!" ("Look out…
Etymology from Wiktionary, CC BY-SA 3.0