casualism

Definitions

1. The doctrine that all things exist, or are based on, randomness.
   uncountable
2. A casual (informal) word or phrase.
   countable
3. An art movement characterized by an unpolished esthetic, incorporating such elements as rough or torn edges, exposed staples, etc.
   countable, uncountable

Examples

“Avoid⟳ casualisms when writing business letters.”

“Try⟳ and is, in AmE, a casualism for try⟳ to […] In BrE, however, try⟳ and is a standard idiom.”

CEFR level