look up any word, like fleek:
A pair of adejectives, cowin and hangin, which, when used together, refer to a person or object as being remarkably unattractive.

Commonly used in South Wales, first encountered by the author in the Swansea area.
"Hey have you seen that Tom Hanks?"

"Yeah, ohmigod he's cowin' hangin'!"

"Yeah, he has a face like a duck's arse!"
by w00fdawg November 06, 2005