The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.

A commonly used facebook term for racist; For those not wanting to say racist, but still wanting to say something

Racits is a very serious, easily contracted STD. It can be obtained through oral, anal, and vaginal sex, as well as through raping someone with your eyes. Symptoms include: a bright green rash on your elbow in a shade reminiscent of the Great Gazoo's pee, loss of armpit and pubic hair, stretching of the earlobes, swelling of the pancreas, diabetes, and cancer of the tailbone. If you think you have any of these symptoms, you should immediately go get tested at your local clinic, as it is potentially fatal.

A no good jive racist. Popularized by an NBA forum.