When you put on tall rubber boots, grab a sheep and put it's hind legs in the boots with your legs. You then proceed to fuck the sheep. This procedure is used to prevent the sheep from getting away.
"Damn man, I am so horny, I'm about to fuck a sheep!"
"Yeah dude, gimme your tall rainboots, I need them for some sheep booting."
Mainlining a drug into your bloodstream, drawing back the syringe to refill it with blood, and then injecting it back into your arm. The theory being, the blood injected back into your bloodstream, will carry with it, any residule narcotic leftover in the syringe.
Person 1: Hey look, Steve started booting all over his mom's new leopard print couch. I think that he had string cheese earlier.
Person 2: Don't you mean Dr. Chester Bootingfield?
Person 1: Yeh, Dr. Chester Bootingfield is definitely making a house call.