Dictionary.com
Thesaurus.com
Synonyms

uncool

American  
[uhn-kool] / ʌnˈkul /

adjective

Slang.
  1. not self-assured or relaxed.

    He felt very uncool, making a speech to strangers.

  2. not sophisticated or worldly-wise.


uncool British  
/ ʌnˈkuːl /

adjective

  1. unsophisticated; unfashionable

  2. excitable; tense; not cool

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of uncool

1955–60; un- 1 + cool (in the slang senses “socially adept”)

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Todd McKinnon might never have become CEO of $16 billion software company Okta if not for an uncool move he made early in his career — and one that goes against the conventional wisdom.

From MarketWatch

Victoria achieved dizzying fame in the Spice Girls, so it's hard to believe that at school, she was "that uncool kid" who didn't fit in.

From BBC

Gen Z, in its infinite ability to rehabilitate the uncool, has decided that porridge is pleasure.

From Salon

“There’s been times you can sense the uncool part of it,” says Kelsey of all the protective gear.

From The Wall Street Journal

Lady Beckham achieved dizzying fame in the Spice Girls, so it's hard to believe that at school, she was "that uncool kid" who didn't fit in.

From BBC