Yes, "brainless" is a word, meaning "without brains."
absurd , asinine , brainless , cockamamy , crazy
foolish, silly, brainless, empty-headed, giddy
A shabalabadingdond is a made up stupid word that a brainless person came up with.
because those people are stupid and brainless and have decided to make their point that they are stupid and brainless even more stupid and brainless.
They are brainless!
siva
Chainless
The Brainless Horseman - 1925 was released on: USA: 13 April 1925
mcdonalds
As thick as a brick (stupid/brainless) Built like a brick sh*t house. (strong/solid)
Heatherbrained - 2010 Brainless 1-3 was released on: USA: September 2010
The zombie was as brainless as a baby