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A moment when your mind completely locks up, and needs to be manually be set back in motion. Similar to a brain fart, but a brain stall can cause a long period of inactivity unless voluntarily EASED back into a conversation or thought process.
Person 1: "Hey, what are you watching?"

Person 2:"..."

Person 1: "Hey!"

Person 2: "Uhh, errr, wait what?"

Person 1: "Are you okay?"

Person 2: "Uhh, yeah, I just had a bit of a brain stall..."
by Unknown29 October 02, 2013
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