The rude or obscene gesture of giving someone the middle finger but in the upside down position.

Performed by giving the middle finger with your hand upside down, while making a stirring motion with the middle finger, as if you were stirring a drink with that finger.

Can also be used to actually stir someone's drink if you intend to really drive the point the home.

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.