An erection of such magnitude that it stretches out all the skin in your body, leaving even the skin on your face so drawn and tight that all you can do is utter "help me," which, because of the taut facial skin, sounds like "reltney."

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.

Also spelled as "rheltney": a hard-on so intense that you can't breathe or blink your eyes. Paralysis can only be alleviated by sexual contact. In derivative Disney culture, Sleeping Beauty, (man with reltney), is awakened (un-paralyzed) by a beautiful prince (woman) by a kiss to her lips
(penis).

An erection that is so massive that you may only experience one in your life since two would cause death.

A hardon so intense that the wrinkles on your forehead disappear and your toes curl up.

An instantaneous hard-on of such speed & intense rigidity that it snaps your head back on your neck.

A boner so hard that a cat can't scratch it.