Definitions by Kimura

mat burn

Basically a rug burn that is caused by skin rubbing across a mat. Usualy happens in Brazilian jiu jitsu.

After sparring today I noticed I got some serious mat burn on the top of my foot.

mat burn by Kimura August 15, 2016

butt tweeting 

What happens when you sit on a smartphone with the Twitter app installed. Similar in concept to butt dialing, but more embarassing because it can be seen by the whole world.

Herp: dsfargeg asdf blueberry muffins
Derp: @Herp wtf?
Herp: @Derp Sorry, my smartphone keeps butt tweeting.

butt tweeting by Kimura January 4, 2012