When something accentuates or enhances the appearance of an object or thing.
Your clothes really set-it-off today!
Set it Off is a band that used to be good but fell off HARD after their 3rd album.
Known for their songs Partners in Crime, and Wolf in Sheep's Clothing
Person 1: "Dude, did you hear the new Set it Off album?"
Person 2: "Nah, bro, they sold out. Their music sucks now."