noun.
A colloquial word or phrase; a common spoken expression, often regional.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
noun.
a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
Word Usage
"Jake's obsessing about his "colloquialism" - meanwhile Obama props his question up to deliver some "on message" remarks regarding energy and healthcare ..."