According to acronymfinder.com there are only three acyronyms for D.U.M.B.
• Duke University Marching Band
• Deep Underground Military Base
• Disasters Usually Motivate Backups
Shouldn’t there be more?
There’s only two for S.T.U.P.I.D.
• Smart Talented Unique Person in Demand (via acronymfinder)
• Simply the Ultimate Planets Interface Door (via acronymattic)

Oh here’s three more for D.U.M.B. Dynamic Universal Music Bibliotheque Democratic Underground Monitoring Blo Diabolically Uncrashable MUD Builder Source: http://www.acronymattic.com/dumb.html
This post has had me humming Nirvana all morning. “I think I’m dumb. Maybe just happy”
I was once a member of the Financial Analytical Research Team