Reverse ten 

Originating from the high five, this variation of "ten" is performed underhand and behind the back. The reverse ten takes great confidence that one will not be "left hanging" due to the fact the responder cannot be seen.

Dude that was an awesome holeshot! gimme some skin...up high...down low...reverse ten.

Reverse ten by high ten March 4, 2009

Reverse Tent 

Guys can pitch a tent, well get ready for the reverse tent.
The reverse tent is for when you have to shit , but are trying to hold it, THUS it 'turtles' in and out- which is why it has also been known as a "turtlehead"

Guy 1: " I was pitching a tent last night watching some porn before bed."

Guy 2: "I was pitching a reverse tent at the movies with my girlfriend last night."

Reverse Tent by Cancerous Queen January 14, 2010

Reverse Tennis Elbow 

That aching pain you get on the inside of your elbow due to holding your phone close for too long.

Caused by blood pooling at the joint and limiting blood flow to the lower arm and hand.

After a marathon session of tumblr posts I stretched my arm out and felt the pain of reverse tennis elbow.

Reverse Tennis Elbow by SWilsonMc October 9, 2018