(British, ambitransitive) To clean the utensils, dishes etc. used in preparing and eating a meal.
You wash up tonight and I'll dry.
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(US, intransitive) To wash one's hands or face, often around mealtimes.
I'm not washing up all these dishes.
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(transitive, of water) To carry (an object) to land.
Dinner is almost ready, so go and wash up.
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Regional slang from around the English-speaking world — British, Australian, Irish, Caribbean, Nigerian, Filipino, AAVE, and the hyphenated-English dialects that make the internet sound local.
See all Regional & Other slang on Slangora.