2.) A person who has his head buried so far up his ass he can't see the truth.
(a) A name usually given to FUDD's who are quisling's to the 2nd Amendment.
(b) Short for "Zumbified, Zumboite, zomboned, or Zumborrhea."
(c) People called or associated with a traitorous act against the 2nd Amendment civil rights of others.
(d) It literally means "dumb ass"
Also: Somebody living a lie for extended periods of time.
I thought my bud was down, turns out he's just a Zumbo.