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The act of giving out Lifesaver mints (Aka Brain Enhancers) and slices (Sticks of gum) on a Friday afternoon during a school day. If you have not had a Brain Fest, we really recommend trying it one day.

Usually done during a lunch, extension, or free period and is popular among Middle Schoolers - High Schoolers.

When having a Brain Fest, people sign a paper to get access to the Brain Fest. A Brain Fest is usually a treat for students and is loved globally.
Yo Kyle, are you going to go to Jason's Brain Fest this Friday?"
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by ErockTheParty September 04, 2018
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