welsh wash

Best definition
welsh wash
Cleansing oneself without the use of running water, and without bothering to remove one’s clothing.
Usually when in a hurry getting ready to go out and without a care for personal hygiene.
I can’t be arsed having a bath – I’ll just have a welsh wash.

or

Kevin is such a dirty minger. He couldn’t be bothered to shower so he just had a welsh wash with a dry towel