In context to appearance and looks, it can relate to a young female who dresses in a way that would make her look poor, filthy, dirty, but yet has friends (who are also Chatt Aye? as well). This would also include her attitude, make-up, dress, talk and posture.
Not used towards Males, and can be quiet offensive to other people.
Pronunciation: "Ch-at-t A?" (Chatt Aye?)
Person 1: "Yuck! That girl is filth!"
Person 2: "Yeah, I know. Steph's Chatt Aye?"
Person 1: "Aye!"