brainfart

/ ˈbreɪnˌfɑːt /

noun

1. informal.
   an idea that a person voices without much consideration, such as during a brainstorming session

Example Sentences

Keyboard detectives have pointed out that the strokes needed to type “erage” are vaguely similar to “fefe”, and that would fit semantically with the rest of the brainfart.

From The Guardian

“A brainfart,” Roberts called it a day later, and he offered forgiveness.

From Los Angeles Times

Must have just been a brainfart.

From Salon