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Definition of brainfart

brainfart

/ˈbreɪnˌfɑːrt/
brain · fart
Plural:brainfarts
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brainfart Lexical Profile

brainfart Game Scores & Validity

• noun

1

A temporary mental lapse, moment of forgetfulness, or sudden inability to think clearly (slang).

Example

"I had a total brainfart during the interview and momentarily forgot the name of my previous supervisor."

Synonyms
View all synonyms for brainfart

Word Nuance & Usage

"Brainfart" (also commonly written as two words, "brain fart") is strictly informal slang and should be avoided in formal or professional contexts, where terms like "mental lapse" or "oversight" are preferred.

• Nearby Words

braincase
brainchild
braindead
brainfart
brainfood
brainiac
braininess

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Brainfart. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/brainfart
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