n, a noun to describe the type of person who upon seeing you immediately want to fuck right in the face with your knuckle,

v, a Fuck Knuckle is a person who would benefit from having their face rearranged on a permanent basis using only a fist

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

General dickhead. See also Fucker, Asshole, Cunt et al.

Brick-like intellegence coupled with new levels of arse-holiness.

Can be used to describe a person who is generally a dickhead, or used when something goes wrong.

An idiot, a dumb person.