Methylating 

When you have to fart in bed, but you hold it just long enough so you can press your ass against your partner's butthole and transfer the methane into them. Methylating is the life essential biochemical process of transferring a methyl group to another compound. Poor methylators require regular supplementation to maintain their health but are often resistant to following their required regimen.

Thomas was pretty butthurt about you methylating him last night.

OMG! He's such a poor methylator. He needs to stop being a little man-child and grow the fuck up.

Methylating by The Methyldonor March 25, 2020

4-methylaminorex 

A rare street drug with effects comparable to MDMA and methamphetamine but with much less side effects.
It's street names are ICE and euphoria

I doubt you actually scored 4-methylaminorex. I'm sure it's regular meth.

4-methylaminorex by QuartzRox February 26, 2004

Methicating 

Using methamphetamine instead of standard medication to cure sickness.

Hey.. Feeling any better? Yes, I'm self-methicating.

Methicating by JeFF&TraviS April 19, 2018