From Longman Dictionary of Contemporary Englishwash up phrasal verb1British EnglishDHCWASH to washplates, dishes, knives etc →washing-up2American EnglishWASH to wash your handsGo wash up before dinner.3wash something ↔ upTAKE/BRING if waves wash something up, they carry it to the shorewash something ↔ up onHis body was washed up on the beach the next morning. →washed-up →wash→ See Verb table
Examples from the Corpus
wash on• Which doesn't mean I intend to leap into bed with you just because fatewashed you up on my beach.wash-upˈwash-up noun [uncountable]the wash-up period is the last few days of the Britishparliament, after a generalelection has been announced. During this time the government tries to get remaining laws passed quickly, with the help of the opposition partiesThe bill was pushed through quickly during wash-up, and some MPs have complained that there was not enough opportunity for a democratic debate.