1. wash one's face and hands

    e.g. She freshened up in the bathroom

    Synonym: lave

2. wear out completely

    e.g. This kind of work exhausts me
           I'm beat
           He was all washed up after the exam

    Synonym: exhaustbeattuckertucker out

3. be carried somewhere by water or as if by water

    e.g. The body washed up on the beach

4. wash dishes

    e.g. I cook and my husband washes up after dinner

    Synonym: do the dishes

5. carry somewhere (of water or current or waves)

    e.g. The tide washed up the corpse