headcrab 

A small basketball-sized alien found in the assumed fictional game Half-Life.

Headcrabs are small light yellow domes with four legs. Their two front legs are long grasping claws, and the two rear are simply stubs to walk on and jump with. Headcrabs find a human-like host and leap for the head, hence the name. They orient themselves on the head and cover the host's face. Their mouthlike structures somehow take control of their host's brain activities and keep them alive as the headcrab. The "zombie" then conforms over times to include long pointy claws on the hands and a mouth that opens between the ribs.

A fully grown headcrab turns into a gonarch, commonly called Big Momma. Four long armored legs and a circular shell to cover the top, gonarch is radial in symmetry. She has a large eggsack and gives birth to baby headcrabs often. Few headcrabs live to this age.

The quick foxy bullsquid jumped over the lazy headcrab's host.

headcrab by Tiki Man January 10, 2004

headcrack 

When someone rolls a 4-5-6 in cee-lo

First I was losin then I started throwin headcrack
after headcrack, got my bread back - Big L, Casuaties of a Dice Game

headcrack by Tha Kid October 19, 2004

Headscratch 

When something unexpectedly good but bizzare happens to you. E.g. a stranger calling you to give you a compliment.

- "Hey, how did it go at Darth Vader's house last night?"
- "It was weird, he didn't alter any deals. A real headscratch..."

Headscratch by Headscratch September 26, 2014

Headcrab 

A parasitic alien that is fucking cute as hell I mean have you even looked at one

Everyone loves headcrabs

Headcrab by Mrcoolgamerdude March 8, 2022

Headcrab Zombie 

Headcrab Zombies are Zombies from Half-Life and Half-Life 2. In Half-Life, scienctist had been turned into Zombies from the Headcrabs. In Half-Life 2, Zombies are from Citizens, but these Zombies can also throw debris at you. Zombies are usally found in non-combine locations (like Ravenholm).

To kill a Headcrab Zombie, you need to use a .357 Magnum or Shotgun. If you don't have those use your Pistol or SMG. Crowbar is ok with Zombies but you might take some damage. Really you need to aim for the head (where the headcrab is), if you aim for the lower body the Headcrab might survive. Throw debris at Zombies if you want but be careful of the suriving Headcrabs and their Torsos. Headcrab Zombies also come in Torsos. Zombies sometimes have no legs so the torsos crawl around in crouch areas like the Auto-Gun junk yard in HL2: Episode Two.

Headcrab Zombie by Mega Sean 45 June 19, 2008

Rusacid Headcrackell 

The sexiest boi in the Wild West. Love him forever and cherish him daily.

Did you see him?
Omg that was Rusacid Headcrackell.
He’s the sexiest boi in the Wild West. I’ll love him forever and cherish him daily.

Rusacid Headcrackell by Ben the Knave June 3, 2019

Poison Headcrabs and Poison Zombies 

Poison Headcrabs and Poison Zombies are from Half-Life 2. Poison Headcrabs are darker and cat-sized and spider like creatures. If a Poison Headcrab bites you, your health will drop all the way 1 percent! However, Poison Headcrabs alone can not kill you, other enemies around finish you off. Hide if a Poison Headcrab bites you, so your health returns to it's normal levels. Poison Zombies are hunch back Zomnies with Poison Headcrabs around it. Poison Zombies are very slow, but strong. They can throw Poison Headcrabs at you (only 2-3), Poison Zombies have large health, use your shotgun alot of times for fire your Assault Rifle at them. Really use a exposive barrel or gas can to beat a Poison Zombie.

Poison Headcrabs and Poison Zombies are more poisonous then normal ones. Poison Headcrabs can be used the same way as normal headcrabs, Poison Zombies are strong and do not come in Torsos.

Poison Headcrabs and Poison Zombies by Mega Sean 45 June 19, 2008