Brain-farting

Brain-farting is when your brain farts in reaction to something hilarious.

Brain-farted is when your brain lagged

Your joke was so Brain-farting

I was daydreaming at my maths class until my teacher surprised me with a question and I legit Brain-farted

fashion brain fart

a brief mental blank when attempting to pick out an outfit, complete forgetfulness of one's own ability to put an outfit together without mental strain.

I've been looking through my closet for hours and I still can't find anything to wear - I'm having a total fashion brain fart!