colloquial

Colloquialisms or colloquial language is considered to be characteristic of or only appropriate for casual, ordinary, familiar, or informal conversation rather than formal speech or writing.

Some examples of informal colloquialisms can include words (such as "y'all" or "gonna" or "wanna"), phrases (such as "ain't nothin'" and " graveyard dead "), or sometimes even an entire aphorism (" There's more than one way to skin a cat ").

- [|Wikipedia]