If thats what makes you sleep at night- Commonly used phrase to make peers nearby laugh. But mainly it means what your trying to say is impossible and would never happen.
Kid :"DUDE I CAN DUNK NOW"
Other Kid: "Yeah if thats what makes you sleep at night."
Other kids: "BHAHHAH"
Other Kid: "Yeah if thats what makes you sleep at night."
Other kids: "BHAHHAH"
by Marztav January 10, 2009