Definition of "uglies"

Yet while the protection premise is solid, cellphone cases are often plagued with a bad case of the uglies.

2009 September 7, Robert Cribb, “Rubbery cases for your loved one”, in Toronto Star‎

The Feudatory States' stamps, with their distinctive designs, are philatelically known as "uglies", a tee well deserved in many cases.

1960, The Illustrated Weekly of India, Publisher, Times of India, Volume 81, Issue 2 - Page 67

British collectors have sometimes referred to these as “the Uglies,” though it’s unclear when or where this term originated.

2017, India feudatory ‘Uglies’ shine at Cherrystone auction‎, Author