Top definition
When you cross your legs and flex your butt muscles together to hold a dump in because your anal sphincter isn't strong enough.
Dude I had a close call this morning. I broke into a shuffle on the way to the bathroom and had to pause half way to do a flex stop.
by hilarioyo September 28, 2013
Mug icon

The Urban Dictionary Mug

One side has the word, one side has the definition. Microwave and dishwasher safe. Lotsa space for your liquids.

Buy the mug