by Anonymous792 March 31, 2009

by heisnurens November 10, 2021

by Not John Doe April 9, 2015

"sick flex" is a reference to two pop culture points of interest. "sick" refers to the mid charting hit "Down with the Sickness" by Disturbed that broke the Billboard top 20 in 2007. "flex" is an homage to the late Billy Mays due to his relentless pontificating on the water-resistant properties of the made-for-tv product Flex-Seal. In essence, you are both down and sticky, a condition we refer to as "Peter Northed".
by Indexfossil May 5, 2021

When you're taking a dump and your butt flexes forcing the poop to retract into your butthole causing the sensation of sandpaper going up your butt.
by Matt Stazjic October 3, 2016

by bob the builder 40785 June 29, 2019

by GhostOnThe5thStreet January 28, 2021
