Monkey /ˈmʌŋ.ki / muhng-kee

[count]
1: a type of animal that is closely related to apes and humans and that has a long tail and usually lives in trees

2 (chiefly British): a person (especially a child) who causes trouble in a playful way
He's quite a cheeky little monkey, isn't he?
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a monkey on your back

: a problem that you cannot easily get rid of or solve : a problem or situation that makes you unhappy and that lasts for a long time
"His drug addiction has been a monkey on his back for years."
"He finally got the monkey off his back and kicked his drug addiction."
"After many years of disappointment, she finally got the monkey off her back by winning the championship."
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make a monkey out of (informal)

: to cause (someone) to look very foolish : to make a fool out of (someone)
"I'm not going to let that salesman make a monkey out of me!"
"more fun than a barrel (full) of monkeys"
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not give a monkey's (British, informal)

: to not care at all about something.
"I don't give a monkey's about their problems!"