interpret the following idioms

[opudu200]

Can somebody interpret the following idioms for me?
1.A principal person does not Go back on his word.

2.Julius visits his father once in a blue moon.

3. The coup was planned but the cat was let out of the bag, before its execution.

4. It is foolish to count one's chicken before they are hatched.

5. During examination period, hardworking students burn the midnight oil.

6. The provost works hard, but his only problem is he has many irons in the fire.

7. Emeka is head over heels in love with chioma.

8. he took his friend's advise to heart.

9. When the armed-robbers visited his house, he had his heart in his mouth.

10. Every wise person should keep ovie at arms length

[Gillnetter]

Can somebody interpret the following idioms for me?
1.A principal person does not Go back on his word.
I'm not sure what "a principal person" is, but one who goes back on his word is one who lies or does not do what he promised.
2.Julius visits his father once in a blue moon.
Usually there is a full moon only once a month. A full moon seen more than once a month is rare. Julius rarely visits his father.
3. The coup was planned but the cat was let out of the bag, before its execution.
People knew about the coup before it happened - someone told about the planned coup, they let the cat out of the bag.
4. It is foolish to count one's chicken before they are hatched.
Do not rely on something before you see it. Chickens are not really chickens until they are hatched (born).
5. During examination period, hardworking students burn the midnight oil.
The students studied late. The midnight oil refers to the oil used for lamps.
6. The provost works hard, but his only problem is he has many irons in the fire.
The provost has too many things going on at the same time. If you have one iron in the fire, you have to pay attention to that iron. If you have more than one iron in the fire, you cannot pay attention to all of them.
7. Emeka is head over heels in love with Chioma.
Emeka is very much in love with Chioma.
8. He took his friend's advise advice to heart.
He took the advice given and believed it.
9. When the armed-robbers visited his house, he had his heart in his mouth.
He was afraid. His heart was beating so fast it seemed to move to his mouth.
10. Every wise person should keep Ovie at arms length
A wise person should stay away from Ovie.

Gil

[Tdol]

This looks like homework. Please do your own homework in future.