the act of a male going jackhammer on a female (when having sex missionary very fast like a 'jackhammer'), then, as soon as the orgasm seems to be present, pull the dick out from the vagina and ejaculate into one's hand and slap the bitch across the face, creating a "cumslap." however, this is considered a "paul bunyan flapjack" when it is jackhammer sex followed by a cumslap to the face.

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.