30,000 feet 

A way to say you are really high (on drugs, usually used for marijuana but can also refer to ecstacy, shrooms or cocaine)

A: Yo, what are you doing?
B: I'm 30,000 feet
A: Already? Damn, its not even dinnertime yet!

30,000 feet by vernaculist June 9, 2010

30,000 Feet Wank 

To jerk off in the airplanes bathroom, specifically mid flight.

Guy 1: I just did the 30,000 Feet wank
Guy 2: Who are you? Why are you telling me this?

30,000 Feet Wank by Whatconstipationlookslike October 30, 2020