Rainbowsperm 

A type of sperm secreted by the vagina of a wolf named Seasonal, who resides peacefully on Wolf-Haven.com with her mate, Sheri, her pack, Shimmer, and her Chatbox friends, AKA The Douchebags. Rainbowsperm is dangerous, and when it comes in contact with another penis/vagina/mangina/pengina, a baby with moar rainbowsperm will be created (an example would be Sealiah).

Dylan is only awesome because he suffered a rainbowsperm attack.

Rainbowsperm by Seasonal April 28, 2011

Rainboo 

A rainboo is essentially surprise rain, that creeps on you unaware.

I was walking through the park when I was struck by a rainboo

Rainboo by Jimlar May 10, 2010

Rainbowically

To colorize items, in the colors of the rainbow.

My grocery list has been colorized rainbowically.

Rainbowically by Poppy11 May 23, 2018

rainbowbug 

Divine virus sought out by bugmen.

Sodomus Prime has the rainbowbug.

rainbowbug by Brutus Autry June 10, 2019

Reading Rainbowed 

How to reading rainbow someone: Tell the person that you’re speaking with something interesting to the point where they are genuinely interested in the topic. When you reach the point where you think the person is most interested in what you have to say and asks you a question about the topic, respond by saying “Read the damn book…ba da da.” (3 note tune that is played in the actual show when a kid would give a book report and cut you off mid-story leaving you in serious suspense). Then inform them that they just got reading rainbowed. You can switch it up and when someone doesn’t believe what you’re telling them; respond by saying “But you don’t have to take my word for it, read the damn book…ba da da."

Tom: Did you know that it’s possible to slow down time when you’re traveling at the speed of light?
Mike: No way, that’s not even possible.
Tom: Yes it is, there have been a lot of studies done on it.
Mike: Wow, how did they figure that out?
Tom: Read the damn book son…ba da da.
Mike: Huh?
Tom: You just got reading rainbowed.

Reading Rainbowed by 13th May 7, 2011

Puking Rainbows

When you eat too many skittles, and then you throw up.

Damn bro, you really ate all those skittles?
Yea- 'throws up'
Ooh that's pretty bad, you're puking rainbows!

Puking Rainbows by lecuaqq June 24, 2022

Sonic Rainboom 

A Rainboom made by rainbow dash in the MLP series.

Rainbow dash made a sonic rainboom to save rarity at the episode 'sonic rainboom'.

Sonic Rainboom by Rainbowsandra June 15, 2016