Similar to an all-female "slumber party", a lumber party is an overnight between male friends.

Lumber refers to dicks. All male party=dicks. Therefore, lumber party.

Similar also to a "sausagefest", but a sleepover.

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.

a gathering of males, typically straight, who gather and sleep in one place, usually due to excessive drinking during a "guys night", (variation on slumber party)

a homosexual sleepover

A lumber party is when you have 12 beautiful girls hide around the house you're staying at, and you "lumber" around and try to find them. Usually teams are broken up into single digits and then the person who finds the most women gets to sleep with each one.