monkey business


noun

frivolous or mischievous behavior.
improper or underhanded conduct; trickery.

Origin of monkey business

An Americanism dating back to 1880–85

Example sentences from the Web for monkey business

  • Monkey-business on company time is only for Big Shots like him; not for small fry such as you.

    The Galaxy Primes |Edward Elmer Smith
  • I'm going to talk to you man to man, Leon, and no monkey-business about it nor nothing.

    Potash & Perlmutter |Montague Glass

British Dictionary definitions for monkey business

monkey business

noun

informal mischievous, suspect, dishonest, or meddlesome behaviour or acts

Idioms and Phrases with monkey business

monkey business

Silly, mischievous, or deceitful conduct, as in The teacher told the children to cut out the monkey business and get to work, or I don't trust that lawyer—there's some monkey business going on. This expression transfers the tricks of monkeys to human behavior. [Late 1800s]