informalism

Etymology

From informal + -ism.

informalism means A word, phrase, behaviour, etc. that is informal. Lexicurio rates it Rare gem — a strength score of 81 out of 100.

noun

A word, phrase, behaviour, etc. that is informal.“At other times, in complete contrast, as noted elsewhere (Section 7.3), there is frequent recourse to slang and informalisms. Speech style in this sense is closely connected to footing.”
An art movement based on abstract and gestural tendencies rather than definite form.