A common muslim term correlating to the piles of hair left behind in common sink and bathroom drains, left behind by their copious amounts of hair on their head and body, or lack thereof. Grungier types may use it for practical jokes, such as gluing it to theirs and others faces, acting like a ninja.

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.