Skullclamp

A skullclamp is a fiercely painful erotic act in which one partner inserts his head into the urethra of the second parter (obviously male) and then has the second partner attempt to squeeze the first partner's temples with his penis while fingering the anus of the said first partner.

Dude, me and Zack tried the Skullclamp last night." "yeah, how'd it go?" "well, he'll be out of the hospital by noon tomorrow......

Skullclamp by Jefersonakl March 31, 2011

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

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

Skullflame Shield

An excellent post 2.3 World of Warcraft Shockadin or Elemental Shaman shield which has procs that scale with +spell damage. This shield was target of a sociological experiment conducted by an Atreus guild member of the Arthas realm which resulted in the creation of a meme.

2001: A Skullflame Shield!

Skullflame Shield by A. Concerned Citizen January 4, 2008