A hardening of the male genitalia that occurs when the video game The Elder Scrolls V: Skyrim is mentioned. It is usually followed by dragon shaped ejaculation flying out of the subject's penis hole.
Richard heard us talking about duel wieling in Skyim and got an enormous SkyBoner.
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.