A phrase used to remind people of how moronic they are being and to bring them back to reality.
Tim, running in a circle like an idiot, screaming
John: Tim what are you doing?
Tim: I'm flying John, flying!
John: CHECK YOUR SHIT TIM!
Tim has an existential crisis, his life flashing before his eyes, his birth, his college years, meeting his wife, having his children, he soon realizes that he's acting like an idiot and stops spinning in a circle
Tim: Thank you John, thank you
by shitchecker1234321 September 13, 2016
Get the Check your shit mug.