funny business

(informal)

dishonest or unpleasant actions If you try any funny business you'll be sorry.

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

verb

Name	Pronounced	Usage
Hannie	HAHN-nee	Dutch
Janel	jə-NEL	English
Springer	['spriŋə]
BÍBorka	-	Hungarian
&Aelig;Thelred	-	Anglo-Saxon
DamhÁN	-	Irish