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  • perp
    perp
    noun
    the perpetrator of a crime.
  • perp.
    perp.
    abbreviation
    perpendicular.

perp

1 American  
[purp] / pɜrp /

noun

Police Slang.
  1. the perpetrator of a crime.


perp. 2 American  

abbreviation

  1. perpendicular.


perp British  
/ pɜːp /

noun

  1. informal a person who has committed a crime

"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 perp

C20: from perpetrate

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.

The potential for extreme gains—and losses—has made crypto perp trading even more popular than spot trading worldwide.

From Barron's • May 29, 2026

“They wanted the misplaced glory of embarrassing a professional athlete with a perp walk,” said the lawyer, Jim Trusty.

From The Wall Street Journal • Oct. 23, 2025

During a perp walk, law enforcement publicly escort a person accused of a crime as they are transported outside a police station or courthouse, usually in view of media cameras.

From BBC • Oct. 4, 2025

Oswald was killed two days later by Dallas nightclub owner Jack Ruby during a perp walk broadcast on live television.

From Los Angeles Times • Mar. 18, 2025

Next time you identify the perp in a police lineup, feel free to point dramatically and say, “That’s him, Officer!”

From "Woe Is I" by Patricia T. O'Conner

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