First time I heard it I was near the bottom of the UC Santa Cruz trails into Highway 9 contemplating this section called "the poop chute" which gets steeper and rockier until you hit a 2-3 foot drop among boulders and the only solution is to have enough speed that you end up in the road. And by "the road" I mean the apex of a blind hairpin turn of Highway 9.
I had been out of the sport for 20 years but kept riding road and my buddy got me back in with a sweet deal on a YT Jeffsy we kitted up with spare parts from all his friends. Carbon everything. A bike that did not exist in any dimension when I stopped riding.
Well, this was probably my seventh or eighth weekend trying to negotiate this chute and there are these 17-20 year old kids at the top and I ask them how to do this. And this guy, with all the confidence of Santa Cruz and youth says, with a big, easy grin, "Yeah, it's just hang way back and full send." And I looked at him. And I looked at the chute. And back at him. And my brain, married with two kids, was like "I see. Ok." And I did it.
Full send. Was exactly what my brain needed to think. It works weirdly well.