an 'ugly duckling' that has become a beautiful swan [=an ugly/unsuccessful person or thing that has become beautiful/successful]
('informal') That dog of yours is '(as) ugly as sin'. [=very ugly]
The house is an 'ugly duckling', but it has a lot of potential.
(..) You tell your friends to stay away from Tao. You want to fight with us than I could sound don't want to see him anymore. That's it, got it? I'll take that as yes. Cause if I have to come back here it is gonna get fucking ugly. Get off of my way. How do you want your dog? I mean steak? Funny. (..)2008 Gran Torino