Medical term that literally means "brainless". Often used to confuse complete idiots who think they're smart.
by Fallie the Pally March 18, 2010
1. (Biology) partially or totally lacking a brain (encephalon).
2. A dumb, dull-witted or obtuse person or being.
2. A dumb, dull-witted or obtuse person or being.
Al believes that life on the sun's suface is possible at night time. He's an anencephalous son of a gun.
by Thesaurus Rex January 26, 2016