Informal or conversational language, usually culturally specific. Not formal or literary.
The majority of the entries in the urban dictionary are colloquiallisms.

by emoolilu November 3, 2005
another word for sperm, semen, jizz, cum, paste out of the wang, white stickey liquid.... also comes in fruit punch snapples to make the taste so sweet
Last night i colloquialed right in her eye, and it felt greeeeaattttt!
by crackbabytwack March 26, 2009
a special use of a common word in a certain geographical region or a word/phrase particular to a region.
In western PA, people may use the colloquialism "red up your room" to tell a child to clean his or her bedroom.
by Lacy October 9, 2003
slang, a word or term that only a few people use, or that's not in common language.
I call it verbal jizm. you call it a colloquialism.
Much of urban language is composed of colloquialisms
by spot off October 7, 2003
An informal expression that is more often used in casual conversation than in formal speech or writing.A slang term used in the current culture. Since the culture evolves so will the slangterms/colloquialisms revelant to that era.
"Friends of the chancellor revealed that he had described Labour MPs as disappointing numpties, a colloquialism meaning idiots."
(Neil Rafferty, "Queen Opens a Pricey Piece of Scots History." The Sunday Times, Oct. 10, 2004)

"I think country gets dumped on across the board by the Grammys." (Toby Keith)

She was recently dumped by her fiance.

"There are traces of cliche ('a tough nut to crack'), attempts at fey colloquialism ('Sometimes I like to sample the zeitgeist') and laboured bits of banter."
(Alastair Sooke, "Self's Punishment." The Times, Dec. 17, 2004)
by therev1953 November 27, 2010