skullcapped 

When one gets a headshot with a high caliber weapon in reference to the fact that the victim’s skull would have it’s top blown off.

Aww man, I got skullcapped by that sniper in the bushes

JFK got skullcapped from the Texas Schoolbook Depository

skullcapped by Grap3Ape August 3, 2020

Skillcap 

The maximum level of performance that can be achieved using the given toolset.

Practicing an activity enough using mindfulness to examine results and create better action for next time, in theory, ones skill in the activity will eventually reach skillcap

Skillcap by Tannhr August 12, 2018

Skullcapping

A sexual action, in which a part of a female's skull is removed, exposing the brain to open air. Then, a male places his genitals on the brain in a style often refered to as "teabagging". The action is highly discouraged as it usually results in death of the female.

Some old man was seen skullcapping Lindsey.

Skullcapping by Ryan,Brock and Justin May 8, 2008

Skullcap 

A sexual position in which the receiver is lying down face up, the giver places his scrotum on the top of their head like a cap, with their penis going down over the nose, like the nose guard of a helmet, ending with the head in the receivers mouth.
Can also be done with the receiver sitting and the giver standing/squatting above them.

Guy #1: dude when she laid down I so planted my junk on her head and gave her a nice sweaty skullcap!

Guy #2: Nice man! *offers hand for high five*

Skullcap by N-Tako April 28, 2009

Skillcap 

Skillcap(skillcapacity) is a term used to define the amount of mastery you can have in or with something. The term is usually used in video games to differentiate between simple characters and complicated characters. Note that skillcap does NOT mean difficulty. Something can be incredibly easy and straightforward yet have a very high skillcap.

Example 1

Person 1: Checkers is such a simple game. Why would you ever want to spend your time playing something so boring?

Person 2: While it may be a simple game, mastering it takes a very long time and the difference between an amateur player and a master player is very big. Checkers is a highskillcap game.

Example 2

Person 1: OMFG Riven is such a low skillcap champion! All you need to do is bang your head on the keyboard and you win!

Person 2: Even though that actually works sometimes, this person has been closely watching your movements and perfectly anticipated your attacks, while flicking his mouse all over the screen and simultaneously pressing his buttons at exactly the right time. That probably took a lot of practice to pull off, so Riven must have a high skillcap.

Skillcap by Someone who is very anonymous October 29, 2018