The person who uses almost all of the milk in the bag, and does not replace it. The person who takes a coffee and leaves a very little coffee in the pot.

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.

Contraction of Last and Bastard. Used to describe the person who leaves the empty roll on the paper holder, empty milk bag in the container etc. Lastards also do things like cramming one last thing in the trash rather than taking it out. In some families it also refers to the person who takes the last slice, chip, cookie etc when not everyone has had a first.