sling up verb4 •To set up a hammock.That looks like a good spot to sling up your hammock.There's plenty fo places to sling up there. •To sell, make or serve (food) at a restaurant.He's been slinging up great barbecue there for years. •(UK) To hang (someone). •(US) To have sex with (someone). formsslung up · slinging up · slings up