1991. Peg Blackstone. Things They Never Told Me in Therapy School: Serious Problems, Surprising ..., page 34:Kids Ways to Say it Better: This category includes stuff like... yuck, icky, uggo, cranky, whiney.etc.
1996. Cherie Bennett. John Lennon & Me, Page 55:(STAR has on an ugly hospital gown.) Mondo-uggo.
2002. Anthony Petkovich. The X Factory: Inside the American Hardcore Film Industry, page 183:... bald, bespectacled, young, uggo... Chong loved ‘em all!
2010, Tana French, Faithful PlaceA bore or an uggo might manage not to get up anyone's nose, but if a girl's got brains and looks and personality, she's going to piss someone off, somewhere along the way.