as ugly as sin

(as) ugly as sin

Extremely visually displeasing or unattractive. This old car is all beat up and ugly as sin, but it's still going strong after all these years. I'm sure I looked as ugly as sin by that point, with my makeup smeared all over the place and my hair a total mess.See also: sin, ugly

(as) ugly as sin

mod. very ugly. This car’s as ugly as sin, but it’s cheap and dependable. See also: sin, ugly