Metacarpus 

Metacarpus is the scientific word for your hand. Your metacarpus is a very good part of your body and is what you use to write idk why I said that. Can also be an insult.

Person 1: Oh dear, it appears my metacarpus is in pain.
Person 2: Oh no! Need ice?
Or
Person 1: You are a loser.
Person 2: You literally are built like the word metacarpus you are not one to talk.

Metacarpus by SliplongariousSlmander May 17, 2023

Metacarpal Scrub 

Using the back of your hands to masterbate in an effort to recreate the feeling of a footjob.

Man, I've been struggling to get any lately. Or, if I find someone willing their feet are nasty. So, I've been getting by on metacarpal scrubs for the last month.

Metacarpal Scrub by ImFCKD December 22, 2017