1 definition by MikepNova
A person who believes in conspiracies, specifically the types that fly in the face of reason, such as the faked moon landing or the government behind 9/11. Named for the famous image of a conspiracy nut wearing a tin foil hat to ward off mind controling radio waves the government unleashes on the unsuspecting populous.
Bob: I'm telling you, the government was behind 9/11!
Steve: Shut up and stop being such a fucking tin-foil.
Steve: Shut up and stop being such a fucking tin-foil.
by MikepNova March 6, 2009