washingup liquid - Spülmittel - Wrong entry in LEO ...
And again: from pages of multinational giant Procter & Gamble, only 1 page (out of 7450) with "washing up liquid" (a European page). Curiously, AE doesn't have an overwhelmingly preferred term for this: you'll find "dish liquid", "dishwashing liquid", the same two terms with "detergent" substituted instead for 'liquid'.
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