There are many conspiracy theories centered around, or at least involving, extraterrestrials of reptilian lineage. Many of these posit that the so-called Greys are in fact reptiles, and should be categorized as "Reptoids".
David Icke claims, based on his exploration of genealogical connections to European royalty, that many presidents of the United States have been reptilian humanoids. In his view, United States foreign policy after September 11 is the product of a reptilian conspiracy to enslave humanity, with George W. Bush as its key player. (See also Bush family conspiracy theory.) Some have also claimed that Reptoids are capable of shape-shifting.
Some conspiracy theorists claim to have worked out a "dichotomy of axes" involved in hypothetical interplanetary and intergalactic conflict, and place the reptilians in an evil "Draconian" "axis", while humans are one of the species that belongs in an opposing "Evadamic" "axis". Several other entities and parties have been placed into this conspiracy theory, with some players who switch allegiances between Draconian and Evadamic.
A subterranean Nazi-friendly super race is sometimes associated with accounts of reptilian humanoids, and also with the telekinetic super race depicted in Vril: The Power of the Coming Race.
Source
----------------------------------------------
I actually know a guy that doesn't necessesarily believe in this, but he seriously considers it. He gives it a chance. When he really disapproves of something even remotely related to the world or politics he likes saying "That is reptilian garbage."