Used to describe an ugly ass baby. Some children just aren't cute at all, as unfortunate as that is. So when you spot a really ugly baby, you can claim "UBS", as they're cursed with Ugnaught Baby Syndrome. The word Ugnaught refers to those ugly piglike midgets that froze Han Solo in Carbonite in The Empire Strikes Back.
"It's a good thing your baby doesn't have UBS (Ugnaught Baby Syndrome) because I'd just have to lie and say they were cute anyway, even if they weren't. Luckily, since your child is adorable, I can tell you that my fears of UBS kicking in were unfounded."
by Derpa Derpa September 10, 2005