Idioms
A group of words which have a different meaning when used together from the one they would have if you took the meaning of each word separately.
Idiom:
pull a boner
Meaning:
to do something stupid or silly
Example:
I pulled a boner when I sent the E-mail message to the wrong person.
List of common idioms, their meanings and examples of their usage in sentences
Idioms are phrases which cannot be understood simply by looking at the meaning of the individual words in the phrase.