Nothing. Perhaps you are thinking of beating around the bush, which means to avoid the topic of conversation.
It means to get to business. Stop beating around the bush and do what needs to be done.
It means "do not go around the bush" -- perhaps you are thinking about "don't beat around the bush," which is an idiom meaning "stop talking about everything except what we need to be talking about and get down to the proper subject." The image is of someone beating the ground around a bush when they are trying to hit a bird that is inside of the bush.
Beating around the bush would be the synonym.
Er ... I think you heard them wrong. That's not an idiom, it's a suggestion that you attack a bush.Perhaps you are thinking of "don't beat around the bush," which means to get to the point.
Hunters beat around the bush when they want to drive their prey out of cover. They don't jump into the bush (because of its thickness and brambles), but they work around it. So "beating around the bush" was taken as a metaphor for speaking indirectly and not getting to the subject itself.
Idioms are phrases that cannot be defined literally - bush is a word, not an idiom. I'm not aware of any special significance of the word.
An idiom in the Harry Potter series is "beating around the bush," which is mentioned in "Harry Potter and the Goblet of Fire" when Dumbledore tells Harry not to waste time by not asking direct questions.
It's a hunting term. If the animal you're hunting is in a bush, you beat at the branches to flush the animal out into the open so you can catch it. If you beat AROUND the bush, you're making a lot of noise and pretending to work hard, but not actually doing anything effective.
I think you may mean "beat around the bush" - see the link below.
It is just an exaggerated way of saying something happens quite often - it is hyperbole, not an idiom.
Beat around the bush means to discuss something without coming to a point. Ex: Quit beating around the bush and just answer the question!
It means that there is not enough for everyone. It's insufficient.