You: Dude i just joined the mile under club.
Friend: You mean mile high club?
You: No, i fucked in submarine bro.
Friend: You mean mile high club?
You: No, i fucked in submarine bro.
by R3FRACION October 10, 2011
Sex in a train going through the Channel Tunnel between England and France, parts of which are half a mile below sea level.
Normally in a toilet but the Half Mile Under Club with Distinction is in a carriage while others are present.
by dustyp August 14, 2009
by Solid Mantis November 11, 2016