Urban Dictionary

The philosophy that when you die, your soul goes up on a roof and gets stuck. (George Carlin)

using email to back out or ditch on plans, dates and even relationships.

(adj) Something which arouses no interest at all.

Used to politely avoid admitting this, which indirectly expresses your indifference.

The common practice of men, where after using a public restroom, instead of actually washing their hands, they simply slightly dampen them under the sink and then dry them on the pants or a paper towel. Thus giving the illusion that they did in fact wash their hands.

Porn created with the game Spore.

A sexually explicit animated icon used in chat conversations.

Intentionally posing in other people's photos, for a later surprise.
Usually people making funny faces in the background, without the knowledge of the main subjects of the photo.