have a bee in one’s bonnet

have Verb

— Someone has something if the thing is in their hands. The person is holding or gripping it. Do you have a spoon, or do you need me to give you one so you can eat the soup? — If you have uto/u do something, you must do it. I have to go. I had to do it. — Someone has something if the thing is that person's thing: the person owns it; it belongs to the person. The rich family has a big house. — If you have you hold something in the mind. I have a doubt about him. — If you have you join something. We have lunch at 13:00. — You use have to say that you suffer from something or to tell the experience. I have a defective vision. (I don't see well.) He had a wonderful time with his friends.

a Determinative

— A is used when the following word could be any of a certain type. Compare "A book I saw on the shelf" and "The book I gave you yesterday".

a Noun

— A is the first letter of the alphabet. The letter "a" comes before "b". — In some schools, an A is a very high grade. Ron got an A on his earth science test.

bee Noun

— A bee is a black and yellow striped insect with wings that makes honey. It has a stinger. That bee is flying to the flower.

in Preposition

— Used to show that something is inside something else. The cat is in the box. — Used to show that someone is at home, or is available. Is John in? The Doctor is now in. — Used to show movement towards the inside. The rain came in through the window.

bonnet Noun

— chiefly Scottish: A seamless woven cap worn by Scottish men and boys; a Tam o'Shanter — British: An automobile hood — British: A metal covering or cowl for a heater, a ventilator, a fireplace, etc. A baby bonnet is sometimes given as a gift to the parents of a newborn. She lifted the automobile's bonnet to check the engine.