You probably use them often. They're idioms - expressions that make no sense if you think about them literally, but that make you look smart and inventive when they're used correctly.
Here are some idioms:
eat crow - admit to being wrong
play it by ear - not plan ahead of time
all thumbs - clumsy, awkward
make no bones about it - be blunt and candid
beat around the bush - avoid getting to the point
