When you burst into a room and shoot your load on a girls face.

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.

To burst into the bedroom and shoot a load in a girl's face.

a sexual move in which the male partner bursts into a room and "shoots" his load into the receiving partner's face; this is a tribute to the special forces who shot osama bin laden in his fuck-face.

A sexual situation whereby a male bursts into a female's room and ejaculates into her face. Named humorously after the popular hide and seek champion 'Osama Bin Laden's' method of death.

When on a plane while a girl is sucking your dick, right before ejaculating, light your pubes on fire and scream "Allahu Akbar" at the top of your lungs.Then activate your bomb vest

Note: You must be wearing turban and bomb vest. Girl must be wearing burqa