It's "to beat the band." In a parade, there is usually a marching band playing lively tunes. If you do something "to beat the band," then you're really doing whatever it is, so much so that people would ignore a marching band for your performance.
It means you have an understanding of what makes a person tick. You know how to make them mad or beat them at something.
he is happy
It is not an idiom, it means your nose is itching.
It's not really an idiom. It means "what are you thinking about."
RFP is not an idiom. It's an abbreviation.
U mean big bang? if its is its means the univerese is made or destroyed in a big bang
"Sieve" is not an idiom. See the related link.
It's not an idiom. It means the tip of your nostril.
idiom means expression like a page in a book
bang is slang for sex
This is not an idiom. It is a measurement. $100,000 is how you write it in numbers.
How did it what? - It isn't known what caused the Big Bang, if that's what you mean.