It's when you take some meat, cheese, potentially some condiments + extras (tomato, lettuce, peppers) and put it in between with 2 slices of bread.

It's also another word for sandwich.

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 word used to describe people who are cool, tight, off the chain, awesome, etc.
Mostly used to descrive men.
The person is cool, entertaining, hot, good looking, etc.

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Also, a person who was born in Chi-Town.
Everybody knows him, he is so fly, Niggas throw him deuces everytime he rides by. Everyone wonders why, he is so cool, but dont ask him, just do what you do.