crackpot theory 

a statement or idea (not necessarily presented by a crackhead) that is extremely extensive in nature and ridiculous in realilty.
often preceeded by: "i believe", or "don't you think", or "whould it be a good idea to...."
(often presented under the influence of drugs)

person1: the free masons rule the world
person2: thats a crackpot theory if i ever hurd one before

crackpot theory by dawordspecialist July 26, 2007

crackpot theories 

Completely insane or inane theories, often dreamed up by paranoid schizophrenics, conspiracy theorists, and ChristianConservatives.

John's ramblings and crackpot theories about UFO's were completely disregarded by his peers.

crackpot theories by b_Alister May 6, 2010