1. Refers to a man’s penis after a man finishes having unprotected sex with a woman on the tail-end of her period. After the penis is withdrawn from the vagina a sticky blood clot may get left behind adhering to the penis, leaving the man with a salsa dog.
2. An irritating person.
3. A hotdog with salsa on top.

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.