A very famous artist.

A man who messes around with other men, but no one would ever know by looking or talking to him. Used by gay black men to identify masculine gay men or DL Brothas.

To hoist yourself up as an authority on a subject that you have no definable or communicable knowledge in.

This is not actually a new definition. The "there" in your definition needs to be "their" and could we please have the tech be of indeterminant gender so that it reads "His/her only response..." or "The tech's only response...?"
Otherwise, it's a valuable new word and definition.