Dictionary.com
Thesaurus.com
Synonyms

weirdo

American  
[weer-doh] / ˈwɪər doʊ /

noun

Informal.
  • weirdos
    plural
  1. an odd, eccentric, or unconventional person.

  2. a psychopath, especially a dangerous or vicious one; psycho.

    They caught the weirdo who attacked the children.


weirdo British  
/ ˈwɪədəʊ /

noun

  1. informal a person who behaves in a bizarre or eccentric manner

"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

Usage

What does weirdo mean? A weirdo is a person who behaves in ways that are considered odd or unconventional. Weirdo is based on the adjective weird, which most commonly means strange, odd, peculiar, or bizarre. Weirdo is very informal. It can be used both negatively as an insult and positively as a compliment, depending on how you feel about someone else’s weird behavior. Much less commonly, weirdo can be used as an informal term for a person considered a dangerous psychopath. Example: My dog keeps licking the wall—what a weirdo!

Other Word Forms

Noun Inflected Forms

Etymology

Origin of weirdo

First recorded in 1950–55; weird + -o

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.

See Examples For:

The private sector exists somewhere out there—the source of all that money—but its customs are foreign to the weirdo revolutionaries who populate the world Ms. Barker once made her career in.

From The Wall Street Journal Jul. 22, 2026

Unburdened by the gravitational pull of parental expectations or affection, the alleged weirdo is free to find her way to happiness by whatever means she sees fit.

From Salon May 20, 2026

I was excited to go where nobody thought I was a weirdo.

From The Wall Street Journal May 19, 2026

Of course, I’d be the weirdo in the crowd wearing my nerdiest James Cameron shirt, a deep-cut reference to “Aliens.”

From Los Angeles Times May 7, 2026

“Why do you think, Mom? I figured the last thing you’d want to do was watch me be your weirdo daughter. Especially in front of a crowd.”

From "The First Rule of Punk" by Celia C. Pérez

"You do get weirdos who are in it for the complete wrong reasons," she said.

From BBC Jun. 7, 2026

Arden isn’t afraid to let weirdos be weirdos in a musical that has a healthy suspicion of surface perfection.

From Los Angeles Times May 1, 2026

The military swarms in to build a metal wall around the titanic alien, and Blunt’s cozy community of 700 swells to more than 100,000: scientists, journalists, tourists, opportunists and the inevitable grifters, criminals and weirdos.

From The Wall Street Journal Jan. 30, 2026

Instead, the plaintiffs sometimes came across as a rogue’s gallery of weirdos, abusers, and fortune seekers.

From Slate Sep. 5, 2025

I was too weird, even for the weirdos.

From "Ready Player One: A Novel" by Ernest Cline

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember new words for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com