Originally Posted by
jfowler85
An idiom is phrase.
Definition of term: n. A word or phrase used to describe a thing or to express a concept, especially in a particular kind of language or branch of study"
-Oxford English Dictionary
Ergo, nit pick is a term, as well as a phrase, as well as an idiom. It's also an expression, and a figure of speech.
Dang man, you were supposed to leave something out so others could get into the act.