brain fart

noun

1. Something ill-considered and said or done impulsively.

   “This is love in the social media age. Candlelight dinner, fine wine, degustation, a lover's face scrunched over a phone screen live-tweeting brainfarts about the relationship to largely uninterested skim-readers.”

2. An instance of absent-mindedness or forgetfulness.

   “Sorry for the brain fart, but what exactly did you say again?”

   “Shadow turned off the heaters, packed some clothes into an overnight bag, then turned back to Wednesday and said, ‘Look, I feel kind of stupid. I know you just told me who we're going to see, but I dunno. I just had a brain-fart or something. It’s gone. Who is it again?’”