COLLOQUIALISM
Meaning of COLLOQUIALISM in English
col ‧ lo ‧ qui ‧ al ‧ is ‧ m /kəˈləʊkwiəlɪz ə m $ -ˈloʊ-/ BrE AmE noun [countable]
an expression or word used in informal conversation
Longman Dictionary of Contemporary English.
Longman - Словарь современного английского языка.
2012