Someone who has gone way beyond their fifteen minutes of fame into becoming omnipresent in every corner of social media, when they became famous for something that shouldn't be bragged about, i.e., a sex tape, reality show, etc., or is a wannabe who aspires to being such by whoring themselves out (figuratively or literally) to get attention.
It can also be used in connection with movie remakes or sequels that have outlived their original entertainment value.

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.

Noun, Adj., It is a name for a family we are all sick of hearing about. It is a slur on Kardashian and refers to their antics, how they dress, and the fact they are race-traitors, sellouts, and sluts.