Updated: NOVEMBER 14, 2016
The term genderfuck can function in multiple ways.As a noun, it can mean an intentional attempt or effort to mess with common ideas of gender roles.As a verb, it can be used to refer to engaging in that effort.As a genderqueer identity, it would be someone who purposely subverts society's expectations of gender; they fuck gender.
More About Genderfuck
One who engages in genderfucking may over-exaggerate stereotypical feminine or masculine features. It is possible that they exhibit both features simultaneously with the intention of causing the viewer to question what they are seeing and ultimately challenge their own preconceived notions about male, female, what those terms mean, and what they look like.