Funny business vs. weird business

[Hany Omran]

Test No. incompl/inter-52 "Business Expressions (1)", question 7

She knew that there was some kind of ......... business going on because strange things were happening.

(a) weird
(b) unusual
(c) funny
(d) stupid

Test No. incompl/inter-52 "Business Expressions (1)", answer 7

She knew that there was some kind of funny business going on because strange things were happening.

Correct answer: (c) funny

Your answer was: incorrect
She knew that there was some kind of weird business going on because strange things were happening.
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What is the meaning of funny business

[Alan]

This expression means something that is not absolutely honest because when you investigate the matter, you find that certain parts don't make sense. You suspect funny business for example when someone phones you up and tells you you've just won a million dollars.
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English as a Second Language
You can read my ESL story Don't bank on it