If you do drugs and need to pass ampiss test, a P-vac isn't an option and you need clean urine, you'll need to do an oil change. An oil change is when you stick a sterile tube in your urethra until urine naturally comes out. Next take a syringe full of clean urine and inject it into the tube. There, your oil is changed.

when you've done something so cringe you can't stop replaying it in your head and it stops you from getting on with your every day life

When an athlete who does drugs has a drug test, and they go to the doctors so they can get there urine switched with clean urine through a giant tube inserted through your penis hole.

A way for an athlete to pass a drug test by inserting a tube up his urethra(penis hole), then inject clean urine in through the tube.

To have sex after a long period of absentience.

First you get on one of the carts you use to go under a car. You roll under your girl when shes on her period, heavy flow. You take out the old tampon and if blood gets on you thats ok your doing your job right. Clean her up, put in a new tampon, roll out from under her and give her a thumbs up.

an oil change is a euphemism for a blowjob, which in turn in a euphemism for oral sex, which in turn does not count as cheating (C: