Klingons.

Singular : Klingon.

Undiligent wiping of the anus post defecation causes excrement to remain on the anal follicles. Eventually the excrement will dry and form tiny spheres that attach themselves to your anal follicles.
In extreme cases the "klingons" can encompass many follicles which can make them painful to remove.

Worf: A very large "klingon".

A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.

Those nasty little balls and shit that get caught in one's butt hair and are a pain to dislodge.

An alien life form from the Star Trek books, television series and movies, origially the enemies of the Federation. Also the Klingon language, tlhIngan Hol, a constructed language (conlang) invented by Mark Okrand especially for the Star Trek movies of the 1980s and Star Trek: The Next Generation TV series.

A language spoken by the klingons from star trek and also by trekies and nerds who have spent endless hours wasting there time studying it

1. Violent aliens from the various Star Trek TV shows.
2. Nerds who think they are violent aliens.
3. Poo stuck to your ass hair; dingleberries.

A tiny piece of shit (Also referred to as a dingleberry) that hangs from your butt hair that is hard to get out.