What's the most backhanded compliment you ever received?

On Halloween night, I took my GF to a Mexican restaurant. Most of the staff there were dressed in costume. The bartender was dressed as Officer Dangle from Reno 911. That included the hot pants that left very little to the imagination. My GF wanted to comment to him that it took a lot of nerve to wear shorts like that. She almost went up to him, pointed at his crotch, and said “Dude, you’ve got balls.”

She stopped herself in time, though.