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
The legendary childish battle of Mainstream and Underground has been rooted itself into the modern world of western pop culture for as long as it has been around. The two opposing sides, Mainstream and Underground, battle a hidden age long war between each other, some completely unaware of this raging war. Anything an Undergrounder considers to be corporate, or money making becomes Mainstream, and anything a Mainstreamer believes to be odd or extreme becomes Underground. Originally based loosely on modern contemporary music such as Mainstream Pop vs Underground Alternative etc, it has now spread to anything controversial that appeals towards teenagers and people under the age of 20. While most Mainstreamers are often clueless of what is actually going around them, and therefore being harmless, many Undergrounders (but not all) are well aware of their own alliance, and because of this, they often abuse situations where a Mainstreamer is seen in an Underground congregation.
Text fits
Save
Cancel