when you're fucking your girl and about to cum, pull out and shoot it in your hand. Make the "spider-man" web slinging hand and fling it on the girls face (or ass, tits, whatever) while making the "pfffft" web slinging sound.

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.

webslinger the art of ejaculating in one's hand then throwing in a female's face in the style of spiderman.

Someone who creates webpages in mass quantity.

Web slinger
A careless masturbater who needs to rid himself of the evidence of his illicit wank by a spiderman flick of the wrist sending the jiz hurtling through the air

The webslinger is when your wife or gf won't give you any play, so you retire to the bedroom and sit on the corner of the bed and jerk off. Once she opens the door, you fling the cum directly at her face using the "Spiderman" hand gesture.

Overused cell phone