资料来源 : pyDict

白话;俗语

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Colloquialism \Col*lo"qui*al*ism\, n.
   A colloquial expression, not employed in formal discourse or
   writing.

资料来源 : WordNet®

colloquialism
     n : a colloquial expression; characteristic of spoken or written
         communication that seeks to imitate informal speech