Join the mile high club. To have sex on a plane. Generally once it's up in the air (hence the mile high) Also included in Nickelback Rockstar lyrics: 
gonna join the mile high club at 37 000 feet.
gonna join the mile high club at 37 000 feet.
by alex.x April 3, 2008
 Get the join the mile high clubmug.
Get the join the mile high clubmug.