Skip to main content
The invisible ceiling or upper boundary located at the top of a map in a video game.
Don't jump too high and hit the skybox, you won't go higher than that.
Skybox by vnquishr May 1, 2016

The Skybox 

The act of removing a ceiling tile from the bathroom ceiling, shitting on it, and putting it back. Eventually the smell becomes unbearable, but no one knows where it is coming from.
"This bastard deserved worse than an upper decker, so I gave him The Skybox."
The Skybox by Andy_Skies October 2, 2011

Skyboxing 

The act of going down on a female while holding her in the air, with her legs on your shoulder
I was skyboxing her so hard, she hit her head on the ceiling fan.
Skyboxing by ThEmEsHaLl December 21, 2010
When you unscrew someone's showerhead and fill the inside with feces. That way the next time they take a shower they will literally be covered in shit. Similar to the Upper Decker, the SkyBox is a step above.
A-"That asshole forgot to lock his door so I left him a present."
B-"What'd you do, give him an Upper Decker?"
A-"Nah, this dick deserved more, so I SkyBoxed him."
B-"You sick bastard!"
SkyBox by DJTepid April 29, 2010
One better than the upper deck. Instead of taking a shit in the upper tank, you take a shit on top of the upper tank. Where the upper deck is a delayed sabotage, the skybox is a blatant act of defiance.
I can't wait to see the look on Marty's face when he finds out I skyboxed his toilet!
Skybox by Anton Vettel December 14, 2010
To sneak a peak at your opponent's bones while playing dominoes, mother fucker.
Julie never notices when I skybox on her bones.
skybox by Gemilie August 17, 2006