monkey on one's back
серьёзная, не решённая проблема
I am not very good at math, and my math course is a real monkey on my back.
Другие идиомы:
- monkey see, monkey do
- monkey around with (someone or something)
- monkey business
- make a monkey out of (someone)
- more fun than a barrel of monkeys
- donkey's years
- ahead of the pack
- alley cat
- as awkward as a cow on roller skates
- as blind as a bat
- as busy as a beaver
- as clean as a hound's tooth
- as conceited as a barber's cat
- as crooked as a dog's hind leg
- as drunk as a skunk