Dictionary.com
Thesaurus.com
Synonyms

funny business

American  

noun

Informal.
  1. improper or unethical conduct, as deception or trickery.

    He won't stand for any funny business here.


funny business Idioms  
  1. Deceit, treachery, unethical conduct. For example, We suspect their outfit has been up to some funny business. [Colloquial; c. 1880]


Etymology

Origin of funny business

An Americanism dating back to 1880–85

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.

Hmm, any other funny business out there worth looking into …?

From Slate • Sep. 20, 2025

In a joint interview with Harper's Bazar in 2019 the two claimed that there was “no funny business at all” during filming.

From Salon • Mar. 22, 2024

He’s asked them all to visit the Dawn Project in Santa Barbara to evaluate his team’s methods, and to bring their engineers to see if there’s any funny business going on.

From Los Angeles Times • Aug. 3, 2023

But while he has added a lot of back stories, especially for Fleetwood, Sonja and Queen, his version also features quite a few new quips as well as some unfortunate broad funny business.

From New York Times • Mar. 17, 2022

“All right, we’re going to check in, drop off our stuff, grab some dinner, and then go straight to bed. No funny business tonight. Got it?”

From "Here to Stay" by Sara Farizan

Vocabulary.com logo
by dictionary.com

Look it up. Learn it forever.

Remember "funny business" for good with VocabTrainer. Expand your vocabulary effortlessly with personalized learning tools that adapt to your goals.

Take me to Vocabulary.com