Top Definition
A strike with the hand, usually the palm, against the back of someone's head. It is used to get the attention of the victim, especially for disciplinary purposes.
When properly executed, a brain duster causes no damage and little to no lasting pain, but does immediately capture the target's attention.
The boy was throwing a tantrum in the middle of the grocery store, so his mother gave him a brain duster and told him to behave.
by katboh October 12, 2005
(noun) Canned air used primaily to clear your keyboard from dust. Used as an inhalant it is known as Brain Duster. User will experience a feeling of blacking out. Use over a long time in a single sitting user WILL hallucinate.
Joe "man i'm all out of beer"
Moe "it's okay man, i've got some Brain Duster"
by BoJiggles September 04, 2006
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