A phrase coined Michelle "Bombshell" McGee (mistress of Sandra Bullock's husband) and spread by news media, referring to the purported sexual arousal due to images of women's feet in high heels pumping gas pedals in large trucks. Whether this is the actual intended meaning or some sort of double entendre for a sex act involving feet is debateable.

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.