colloquialism

n. expression used in familiar and informal conversation

A colloquialism is an expression not used in formal speech, writing or paralinguism. Colloquialisms can include words (such as "y'all", "gonna", "deadly" or "grouty"), phrases (such as "ain't nothin'" and ""), or sometimes even an entire aphorism (""). Dictionaries often display colloquial words and phrases with the abbreviation colloq. Colloquialisms are often used primarily within a limited geographical area.
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Noun
1. a colloquial expression; characteristic of spoken or written communication that seeks to imitate informal speech
(hypernym) formulation, expression
(class) potted

(n.)
A colloquial expression, not employed in formal discourse or writing.
  

n.
بات چيت يا بول چال کا فقرہ