Literally, when somebody's brain has stopped functioning such that they will never regain conciousness, hence coloquially somebody who is idiotic, dumb or clueless beyond belief. Similar to "too stupid to live".
by Linton July 11, 2003
Joe:Poor guy, he smoked way to much pot.
Bill:He's quite the vegetable.
Joe:Maybe we should wipe up the drool from his chin?
Bill:Naw,he is braindead,he will just keep drooling.
Bill:He's quite the vegetable.
Joe:Maybe we should wipe up the drool from his chin?
Bill:Naw,he is braindead,he will just keep drooling.
by Roflmfaoamp May 22, 2009
Gory zombie horror film of extremely high calibre by Lord of the Rings' Peter Jackson and Fran Walsh. Great stuff.
by cakeandfinewine September 23, 2004
Jason: Sunny, can I braindead you?
Sunny: Sure thing hun!
*30 minutes later*
Jason: You alright Sunny?
Sunny: I can bake I can bake I can bake
Sunny: Sure thing hun!
*30 minutes later*
Jason: You alright Sunny?
Sunny: I can bake I can bake I can bake
by the savageness April 13, 2011
by APersonYouMightKnow April 23, 2019
Shit got craxy at the party mansion. Next day Jono was wondering why he could not function when it occurded to him that he had braindeaded himself. Things are simpler for him now.
by Jono@partymansion February 17, 2008
by CHINGPINGLING January 16, 2011