HeadMate 

A headmate is an "Alter" of someone who has Dissociative Identity Disorder. A headmate is their own person who has split off from the original person's mind, who has their own separate wants, goals, needs, gender, age, etc.

These headmates are usually formed as a coping mechanism, helping the person with DID to survive the traumatic experiences that they have been a victim to. A collection of headmates including the host is called a Multiple/Median System.

Due to the large amount of systems on Tumblr, it has been wrongly labelled as a "Tumblr trend" and been accused of mocking mental illness, despite it being a mental disorder in itself.

headmate,alter,DID,dissociative identity disorder,mental illness,tumblr,system,multiple,

HeadMate by 6yrhters April 24, 2016

Headmate 

Someone who shares a physical body with one or more people, or someone in a plural system. This term was coined by non-traumagenic systems, though it can be used by any kind of plural system.

A headmate is also sometimes known as an alter (though mostly in traumagenic systems), or simply system members.

“We got a new headmate today.”

Headmate by sonderwrites September 22, 2020

Head Meat 

The presence of a large amount of flesh on the forehead of a person, typically a man in his thirties whom happens to look like a human thumb.

"That bitch Aubrey, that bitch got that head meat."

Head Meat by SomeUrbanLinguist January 11, 2019

Headweather 

Mental state of affairs.

Jane is serene, her headweather is good.

Headweather by Alice Crowley April 4, 2009

HeadMate 

An alternate personality or identity living in your head. Similar to a roommate or a house mate, but inside your skull. A person who describes themselves as having headmates is saying that they have people living in their heads who they have conversations with.

Some people can claim different ethnicities or sexualities, thus allowing them to join an autonomous caucus (for instance queer or women’s) that they were not otherwise entitled to join.

When they are acting as the personality of one of their headmates, they call this "fronting"

Related to Otherkin, Multiple Systems, and Tumblr social justice activist

I was so out of it I blacked out and one of my headmates took over and drove the car home.

HeadMate by psuedon April 7, 2013

heatmeat 

when your beating tour meat in the summer

lil jonny got caught heatmeat in the car

heatmeat by your senapi (girl) December 12, 2019

headbeater 

The action(usually in porn films)films where the male actor beats his dick against the female or males head.

After she gave him a blowjob he took his cock out of her mouth and gave her a quick headbeater.

headbeater by 16andbeautiful November 2, 2017