colloquialism

US /kəˈloʊ.kwi.ə.lɪ.zəm/
UK /kəˈloʊ.kwi.ə.lɪ.zəm/
"colloquialism" picture
1.

口語表現, 俗語

a word or phrase that is not formal or literary and is used in ordinary or familiar conversation

:
Using 'gonna' instead of 'going to' is a common colloquialism.
'going to'の代わりに'gonna'を使うのは一般的な口語表現です。
The book was full of regional colloquialisms that made it hard for outsiders to understand.
その本は地域特有の口語表現でいっぱいで、部外者には理解しにくかった。