2)Usually told about an aircraft who has lost any thrust because of engine failure or running out of fuel.
2) "DELTA 2, Bingo fuel! RTB"
...after a while...
"DELTA 2, we're gliders!"
"BASE to DELTA 2, uncorrect, you're fucked up!"
To be a true glider however, some may argue that the woman must be fully aroused for the optimum gliding effect though some have reported an effortless glide on un aroused and often sedated females.