Well, my guess is that it is very likely that you know one or two out of these three words. If you know all three confidently, congratulations! And, I'd like to invite you to share your learning on this forum. Thanks!
Here is a brief summary of what I learned about these three:
- A wingman is an accompanying friend who offers support. It came from a simple two-aircraft formation, in which the support aircraft flies slightly behind and off the wing of the lead aircraft.
- Windsuit flying is the activity of human flying downward in air from a cliff or some other height with the use of a windsuit, which has a web between each arm and the body as well as between the two legs.
- Skydiving is the activity of human coming down in the air from an airplane or some other height with the use of a parachute.
A note of warning is necessary here: The above summary is written up very quickly for sharing and is not guaranteed to be complete nor authoritative. The reader is strongly urged to look up a dictionary, since un-authoritative study shows that this increases the opportunity of remembering a word by as much as 47.32%.