monkey business
US /ˈmʌŋ.ki ˈbɪz.nɪs/
UK /ˈmʌŋ.ki ˈbɪz.nɪs/

1.
perbuatan nakal, penipuan, gurauan
silly, dishonest, or mischievous behavior
:
•
Stop all that monkey business and get to work!
Hentikan semua perbuatan nakal itu dan mulakan kerja!
•
The teacher suspected some monkey business was going on during the exam.
Guru mengesyaki ada perbuatan nakal berlaku semasa peperiksaan.