uglies noun[plural only]2 •(informal) Ugliness.Yet while the protection premise is solid, cellphone cases are often plagued with a bad case of the uglies. — 2009 •(informal, disapproving) The stamps of the Indian feudatory states.The Feudatory States' stamps, with their distinctive designs, are philatelically known as "uglies", a name well deserved in many cases. — 1960