What is 27th Base?
Taking 7 males, and going into the Russian zero gravity aircraft (vomit comet). Seven virgins should also be present. Then engaging in bisexual intercourse with all those involved simultaneously - usually involves having new holes torn in the muscle of your anus to accommodate males.
Dude #1: Wow....
Dude #2: What....
Dude #1: Someone found a new base so uploaded it to Urban Dictionary.
Dude #2: OMMFG. Do they not already have...
Dude #1: Yeah.... 26.
Dude #2: Yeah. Someone went to 27TH base