someone who's low; mean; dishonest

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.

This is an old term dating back at least 100 years. My grandmother from Eastern Texas used it quite often to describe an uncouth person. I believe it refers to persons who probably didn't have an out-house or toilet, then when they dropped their pants and stooped down to evacuate their bowels, they would sometime hit the back of their shoes or boots. Of course, they probably just as often hit their pants.

Slang for an idiot, a despicable person.

An asshole; a despicable, loathesome person.

A piece of human filth that thinks he is superior to everyone else on the planet.

An obnoxious person who is generally disliked.