Quick Definition: The phenomenon where a PUA seems out of spirit after many sets during a day, and then suddenly finds the strength and momentum to have a go at it again with renewed energy that seems like it is coming from nowhere.
Full Definition:
Second wind is a phenomenon in distance running, as well as other sports, whereby an athlete who is too out of breath and tired to continue suddenly finds the strength to press on at top performance with less exertion. The feeling may be similar to that of a “runner’s high”, the most obvious difference being that the runner’s high occurs after the race is over. Some scientists believe the second wind to be a result of the body finding the proper balance of oxygen to counteract the buildup of lactic acid in the muscles. Others claim second winds are due to endorphin production, while still others believe it to be purely psychological.
Understanding second wing gives PUAs a longer time frame to go out and improve their game, or get more numbers. The PUA can sit down, rest, eat, or otherwise rest to restore his energy.

Super Saiyans get stronger as long as they live, even if they are beaten to the bone
Usage:
We got a second wind after dinner and went out again in the marina
Related Terms: Approach, Opening, Day Game, Night Game, Venue, Rejection, Cockblock, Motivation Factors, Success Barriers, Congruence, Seducer’s Aura, Eyes Go Bright