Overview
Deformed (デフォルメ, deforume), the Japanese art term, originally meaning simply "to change form", it has come to be used in the field of art to refer to expressing an object by intentionally transforming it. This applies to any kind of exaggeration, and the direction of the exaggerated look is not limited.
Note that in the U.S. and elsewhere, the term is also commonly used in a completely different sense in places unrelated to art or expression.
For more details about the real life happenings of it refer to the article deformation.
Incidentally, when the word defo (デフォ, defo) is used, it is thought to be an abbreviation of default (デフォルト, deforuto), not the art term. Default refers to the normal state of affairs (finance).
