When a woman cuts the palm of her hand and proceeds to give you a handjob. Originating from when in the novel Huck fin, Tom Sawyer and Huck Fin cut their palms and shake hands to make a pact.

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.

when you put your arms out and twist up right before u spin off the lip of a jump. considered very unsteezy