1. Someone who's head is devoid of nominative brain tissue. Similar to the more common air head the cranium of the subject contains nothing but gas. However in this instance, the gas inside the cranium consists mainly of stinky gut methane.

2. Someone who consistently brain farts.

Brain fart- also known as “fartus brainus” is very common around students, who study math, physics or chemestry. It’s caused when you’re brain does not know what to do aka it’s about to explode. Treatment: give up or go to sleep

When you forget something really important.

Whenever your brain just stops to function for a hot minute

John: hey max how are you?
Max: Hey max I'm good, how are you?
John: did you just great yourself?
Max: I'm sorry my brain farted I couldn't think straight

To say or do a stupid

A term one uses when they can't remember anything and are just overall feeling awfully stupid today. When you are trying to solve a math problem, but you completely forget what to do.

Brain farts are creative thoughts that come up when a provocative question is posed but that you hold back because you're afraid of judgment.
Farts are natural, and suppressing them is unhealthy and stupid. Same with brain farts. There is no good or bad thought or idea.

A setting that encourages participants to release their brain farts invites healthy engagement without stakeholders judging their own thoughts too much on a subject matter.