by jumbojelly October 29, 2019

When someone is acting dumb, they are a dumby. The logical spelling of the popular word dummy.
Pronounced (DUM-b-EE)
Pronounced (DUM-b-EE)
Jerome: Gosh, Alan, you're being such a dumby!
Alan: What the hell, Jerome? Dumby? What is that?
Jerome: You're being dumb. You're a dumby!
Alan: What the hell, Jerome? Dumby? What is that?
Jerome: You're being dumb. You're a dumby!
by Jemima Hootensnancle January 05, 2009

by El Jeffi May 16, 2019

by Nads August 26, 2004

A derogatory slang term for a specific type of metal head that is extremely elitist, is rarely seen in places other than the internet, listens to doom metal, plays Dungeons and Dragons, World of Warcraft or engages in some other type of nerdy activity. A dumbis is usually fat and will dress in cargo shorts, skate shoes, and an Isis shirt. Dumbi rarely have long hair like other metal heads, instead opting for a long neck beard or slightly "shaggy" hair.
by BroUpBroDown February 26, 2011

Someone, usually a friend, who does something unbelievably betraying or idiotic. Strong way of saying, "dummy."
by Marzipanesque June 07, 2007

Common misspelling of the word dummy, almost always used by the people who can easily be described by the word itself. Just because dumb has a "b" at the end, does not mean dummy has to. Also, dummy does not rhyme with Gumby.
by Crunk Dizzle September 21, 2008
