An adjective which is derogatory towards what you are describing. This began when there were crows picking out of the bin in the back garden which is filled with old plates we couldn't be bothered washing up. I retrieved a tea mug out of this bin to wash and use and so it was dubbed a "crow mug" and I SWEAR it tastes of nest.
Can also be used to describe ugly girls.
"Ugh this burger is well disgusting.."
"Ew, Crow burger.."
*see's a fat girl with her rolls hangin out*
"Aww fuckin crowie over there mate!"