a troll that lives in girls mouths so that they cannot kiss, similar to pillow pants (pussy troll), but in the mouth

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.

Term used by the character Elias in the Kevin Smith movie Clerks II. It is a "troll" placed by one's parents in a girl's mouth at a young age in order to prevent open-mouth kissing before the age of 21.

See also: pillow pants