planetarium 

The result of ejaculating on a sexual partner with dark skin. Named for the likeness of a clear night sky (or planetarium) with the contrast of droplets of ejaculate on dark skin.

Craig: Hey, African American girlfriend. Remember that time I popped one out on your belly.
Tracy: Yes, Craig. The contrast of your ejaculate on my awesome dark skin reminded me of a planetarium.
Craig: You might say that I gave you a Planetarium.
Tracy: Sure ... I guess you could.

Reginald: Yo, Franz, I heard dat Victoria got a photo of her planetarium up on da Facebook?
Franz: Shhhhiiittt. You mean a photo of dat booty with a bunch of cum all up on da surface of it?
Reginald: Yes.

Omar: Hey, Becky, did you hear that the superhero Captain Planitarium saved an entire city this morning?
Becky: Oh, really? How did he do that?
Omar: He ejaculated on everyone!

planetarium by richardblack3 April 24, 2014

Rochester Planetarium 

A place where stoner's go in January on Saturday nights to get baked and see a Laser-light show consisting of Pink Floyd, Led Zeppelin, or The Beatles.

Adam, Ryan, and Jun, always go to the Rochester Planetarium every weekend in January to watch the laserlight show while HIGH.

Rochester Planetarium by lakshmi234423 January 9, 2009

Yuk Yuk Planetarium

The Yuk Yuk Planetarium is a sexual act, usually involving two men, in which the couple are fucking doggystyle, and the pitcher places a box on the catcher’s head, and the pitcher smacks the catcher with a foreign object causing the catcher to see ‘stars’ while laughing like goofy.

‘What’s Colin’s problem?’
‘ I heard someone Yuking it up in the woods, and since Colin is obviously concussed, he’s likely been to the Yuk Yuk Planetarium with Chris again!’

Yuk Yuk Planetarium by Professor Switzleheimer December 28, 2023

Negative Planetariums 

The term for when a woman's breasts are so covered with moles that they resemble two inside-out planetariums with inverted color schemes, the moles of course being the stars and planets.

Eric: So I picked up this girl at the campus bar and brought her back to my dorm, but as soon as i had her shirt off I realized she had moles everywhere. Her tits were like a couple of negative planetariums.

Steve: Did you find the big dipper?

Eric: Well she sure didn't, if you know what I mean.

Negative Planetariums by bladzes October 4, 2009

pwnetarium 

When one prevails against all odds over the competition with overwhelming awesomeness.

Dom: "man you looked pretty mashed today during your training"
Duy: "well it is a fact that I was indeed le tired. but despite having my head down, looking like I was dozing it off, I was the only one that caught the instructor's mistakes, bam!"
Dom: "really?"
Duy: "totally. I really went to the Pwnetarium today! (TM Duy Jan 9 2014) "

(Original conversation edited for extra effect)

pwnetarium by masaruduy January 10, 2014

Planetarian

One who eats food that is lighter on the planet. One can be a meat eater or a vegetarian and still be as Planetarian as long as he/she pays attention to where food comes from and its overall footprint.

When I follow my Planetarian diet and pay attention to where my food comes from, I feel like I not only eat healthier but I also feel like I am giving the Planet a bit of a break.

Planetarian by katmandan January 3, 2012

Planetarianism 

Planetarianism (Planetary Humanism) is a Humanist political philosophy emphasising the importance of universal values and affirming the need to strengthen the unity and the influence of international institutions. Also, Planetarianism advocates the decentralization of governments and the establishment of the society as the essential unit of politics.

Planetarianism is a humanist political movement.

Planetarianism by Maximilian Justinian October 22, 2008