Stretching your scrotum and balls over a person's face, and laying your penis on their forehead, resembling a flying squirrel with its arms spread. Done properly, this will cover the person's mouth and nose completely. To create a good suction, make sure your balls are warm before proceeding. Injury can occur if the person was sleeping and wakes up being suffocated by your massive nuts and sac.
"Dude, Candace passed out so I gave her a flyng squirrel. She woke up totally choking on my sac!"