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.

Short for "Now What The F*ck?"

From an Ohio news story where a woman's license plate was determined to be obscene.

This may be the first case where the DMV has coined a hip phrase.

Internet abbreviation for "Now what the f*ck?"

Recently became newsworthy when a 74 year old woman received a complaint from the BMV in Columbus, Ohio that her vanity plate with the letters "NWTF" "violates the agency's standards against profanity." (AP) The letters actually stand for a business, "Northwood Tree Farm," she ran with her husband.

now what the fuck / not worth the fuck

supposedly it means now what the fuck, according to the Ohio Bureau of Motor Vehicles

NWTF is an extension of WTF meaning "Nipply What The Fuck". It is the proper exclamation upon seeing a mother breastfeeding in public.