1) To find the residue of a function. The residue at an isolated singular point z0 of a function f(z) is defined as the contour integral of f(z) around C, all over two Pi i, where C is a positively oriented simple closed contour enclosing z0 (and no other singularities of f(z)) and i is the imaginary number defined as (-1)^(1/2). Alternatively, one can define the residue as the coefficient of the z^-1 term in the Laurent series expansion of f(z) about z0.

2) To jizz on that bitch's 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.