What is Dressed For Trade?
1.
A description of a woman wearing tight and/or revealing clothing, with (un)suitable hair, makeup, shoes and jewellry, making her appear like a prostitute seeking clients.
The term does not imply that she actually is a working girl, merely that she is dressed blatantly to attract men; it can be used perjoratively by other women about somneone they assess as better dressed or more attractive than themselves - the object of their ire does not necessarilty look sleazy or cheap.
"Oh my God, look at Kitty ! I mean, boots, fishnets and a miniskirt ?"
"That bitch is dressed for trade, you'd better get Mike out of here, they used to date and she's obviously on the prowl again."
See