look up any word, like cleveland steamer:
 
1.
A temporary spacing out, or lapse in judgement where one makes an error in thought or analysis.
He answered much more difficult trivia questions, but when asked the answer to 9 squared, he had a brain glitch.
by Raoul_16 November 13, 2007
 
2.
Then your brain has a random thought that could only pop up in a pedophiles mind. Usually includes rape, kidnapping, free candy, white vans or small children age of 5-10 and then you think to yourself, what the hell am I thinking, fixing the glitch.
{Example of Brainglitch}

Brain: That girl, she's alone. Nobody would notice if I...
You: WHAT THE FUCK AM I THINKING?
by ThatRandomPedo May 31, 2014