When it takes one's brain a few seconds to catch up with their actions.
Person A: Dude, you just tried to drink a sandwich.
Person B: Huh? Oh great... Brain Lag.
by Kick to da ballz July 15, 2011
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The sleep-deprived, often disorienting way a person feels after working on so many impending deadlines their life has become a blur, usually made possible by the regular consumption of several litres of caffeinated beverage in short amounts of time.
Huh? Oh, I get it now. Sorry: brain-lag!

Employer: "Have you been here all night? You look like shit!"
Employee: "Yeah, a bad case of brain-lag..."
{employer leaves cubicle}
Employee: "...bastard."
by Adam Schilling February 16, 2006
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The word you say when you see or hear something so confusing that you spend a literal 10 seconds to process what just happened.
Friend: But why where we need this that or something fool consequences?
Me: Oh wow, my brain just lagged.
by The7Guy November 12, 2020
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During a gaming session, brain lag is when your brain does not work until it is too late in some situations.
EnderBender28: "Bruh why didn't mash there until it was too late? You got grounded by DK Side B."
PridedFox77: "I had brain lag."
by PridedFox77 September 15, 2022
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