A compliment you say to somebody for inderectly suggesting that you find them sexually attractive.
This term applies to comments where you intend to or accidentally hint that you think they're attractive.
"Did you see John give my wife that sluthanded compliment at dinner? He's obviously trying to be sly about making inappropriate comments toward my wife, and I will not tolerate it"
-- Self-conscious married douchebag
Example of an actual sluthanded compliment: "Hey your girlfriend's dress looks really good tonight, she could model in that, you're a lucky guy."
-- Sly and smart toolbag who clearly wants to fuck his friend's girlfriend