A person of either gender who's list of strong points does not include physical attractiveness. Always a very nice, pleasant person who is funny and fun to be around, but who is most definitely sleeping alone tonight. These people would also be said to have inner beauty, a good heart, and possibly a hearty constitution.

See Also: insulting compliments

There is a fairly funny TV Ad here in Australia that goes like this:

First Bloke: How's your new girlfriend?
Other Bloke: Oh, Linda? She's got the best personality. What about your new girlfriend?
First Bloke: She's butt ugly as well.

With the catchphrase of this commercial to drink a certain flavoured milk product, and be yourself.