wash up

1.  Wash one's hands and face, as in It's time to wash up for dinner. [First half of 1900s] Also see clean up, def. 2.
2.  Clean the utensils after a meal, as in I'll cook dinner if you promise to wash up. [Mid-1700s] Also see do the dishes.
3.  Bring about the end or ruin of; finish. This usage is often used put in the passive, be washed up, as in She's all washed up as a singer. [Colloquial; early 1900s]

The verb has 5 meanings:

Meaning #1: wash one's face and hands
  Synonym: lave

Meaning #2: carry somewhere (of water or current or waves)

Meaning #3: wash dishes
  Synonym: do the dishes

Meaning #4: be carried somewhere by water or as if by water

Meaning #5: wear out completely
  Synonyms: exhaust, beat, tucker, tucker out