-when you inhale exhaled smoke
-breathing in the smoke you just let out or someone let out near you.
-the inhaled smoke needs to be thick not "pussy" smoke
-smoke dealing usually with hookah or bongs

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.

A reverse genie is when you rub something hard and something goes back in instead of coming out. Most commonly found in the bedroom when instead of ejaculating from the penis a man actually sucks in.