"Hit the books" is a sentence.
"Eat, drink, and be merry" IS a sentence.
He told me I had won, but I thought he was pulling my leg.
The more honest a person is, the more he bears the brunt. This is an idiom stating the ordinary man.
Leaders like her are a dime a dozen.
Yes: "Beauty is in the eye of the beholder."
keep your chin up!
We must put an end to piracy, once and for all.
that night i gave mama a test and it was a peice of cake
The idiom "keep an eye out for" refers to watching for something or someone. An example of a sentence using the idiom would be: Jeff should be arriving soon, so keep an eye out for him.
"Animal" is not an idiom. An animal is a living thing with more than one cell which cannot make its own energy.
As regards our political opinions , we're worlds apart !