person who works in a steelmill(derogatory)

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.

Cool bums who hang out on mill ave in tempe, arizona. Often these people are artists, who will make you things or preform for you if you give them attention.

Young homeless people and panhandlers who congregate around Mill Avenue in downtown Tempe, Arizona. Though often used as a derogative term, it is also used by the street people to describe themselves.

Probably coined as a variant of mallrat, with "mall" replaced by Mill Avenue.

An utterly despicable waste of space that inhabits Mill Ave., in Tempe, AZ. They pass themselves off as artists when in all reality they are no-talent-ass-clown-college-drop-outs that survive off of the donations of others nearly as retarded as they are.