A pork sandwich is when you have sex with a woman in the morning and then another woman in the afternoon and then end up with the first (original woman) again at night.

The woman you originally have sex with in the morning and later that night is the bun. The afternoon piggy is the meat. Hence the name, Pork 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.

The pork sandwich consists of having a sexual encounter with two obese women. The pork sandwich could potentially be the end result of a long night of hogging.

Giving sexual intercourse. In reference to providing a dick but can also be used by bitches but that's kinda silly :)

The act of combining two people's (of opposite sex) genitalia; the male being the pork (Penis) and the female being the two slices of bread (Labia), to make a sometimes but not always, amazing sandwich.