Top Definition
This usually occurs early in the morning, and the period you can be affected by it will extend the less sleep you got the previous night. During a Brainlapse, you forget where you were going, what you were doing and sometimes who you are.

Brainlapsing is usually accompanied by a halt in movement until the Brainlapse has passed.
Person 1: Hey, Person 2.
Person 2: ...
Person 1: Hello?
Person 2: Wha-
Person 1: ...
Person 2: Oh, right. Sorry, I had a Brainlapse. I was up late last night.
by Jake Was Here November 26, 2007
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