A bike whore is that girl who has ridden on the back of every guy's motorcycle in town. Not necessarily a whorish girl; just gets around on a lot of bikes.

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 bike whore is someone who uses guys for there bikes. She can't seem to stick with just one guy either, instead it's with every guy in the group or town. She is definitely someone who gets around with not only the bikes but with the guys too!

someone who has they're own bike but chooses to ride everyone elses bike