Top Definition
A mental palate cleanser, something to clear your mind after seeing something disturbing or simply having a bad day. see also, mindbleach, unicorn chaser.
Ugh, I've had a horrible day cleaning up roadkill. I need a brain douche.
by Braindouche! December 07, 2010
Someone with a restricted mental capacity, i.e. anyone using the internet seriously.
That Gary Sinise is such a braindouche.
by bible April 29, 2005
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