Despite what the name might have you believe initially, this almost always applies to middle aged cishet white dudes.
(note that they don't have to be all of these to fit under the non binary funny guy umbrella but most non binary funny guys have these traits)
A non binary funny guy is a real life person,usually some kind of celebrity, who could be described as
skrunkly or even
scrimblo.
Non-binary people generally like to make jokes surrounding them treating them as a
k-pop stan would treat their idols. They do this despite the fact that these people are just awkward white content creators/actors/etc.
It can be described as semi ironic depending on the funny guy and the person who finds the guy funny. There's no real concrete definition to this but it's recognizable when you see it.
examples include:
jerma985 , Bob Odenkirk,
Paul Dano (unfortunately) , Mads Mikkelson, etc.