Skip to main content
Dictionary
Store
Blog
World
Help
Advertise
Chat
System Status
Information Collection Notice
Trademark Concerns
reCAPTCHA Privacy
Terms of Service
reCAPTCHA Terms
Privacy Policy
Accessibility
Report a Bug
Data Request
Contact Us
Security
DMCA
© 1999–2026 Urban Dictionary ®
Mugs
Tees
Hoodies
Pro Customization
Create unique products with your own words and definitions
Preview
Personalize Your Design
Your Word
Your Definition
An anti-gravity metal featured on the cartoon series ROCKY AND HIS FRIENDS/ABC/1959-61 & NBC/1964-73. Upsidasium was discovered by Dewlop D. Moose, the uncle of Bullwinkle J. Moose. Rocket J. "Hokey Smokes" Squirrel and Bullwinkle protected the Upsidaisium mine from falling into the hands of Pottsylvanian spies Boris Badenov and Natasha Fatale who sought to use it for their nefarious scheme of world domination. Because the government needs Upsidaisium, Bullwinkle and Rocky fly the mountain to Washington. Also thwarting them at every turn are Mojave Max and Death Valley Dotty (Boris and Natasha in disguise). TRIVIA NOTE: In the 1990s, there was an Australian rock band called "Upsidaisium."
Text fits
Save
Cancel