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A Doomba is an amalgamation of the Roomba; a series of autonomous cleaning devices made by the company iRobot and various weapons such as knives, chainsaws and fireams which are strapped or somehow attached to the machine. The word "Doomba" comes from the merging of the words "Doom" and the previously mentioned "Roomba". This has recently become popular on various Internet sharing sites.
"Hey Johnny, I strapped some knives to your mom's Roomba, let's watch it go around the room."
"Yeah, now it's a DOOMBA"
Doomba by samwaffleman August 12, 2012
Related Words
A Doomba is a death dealing floor cleaning robot. A Roomba (the popular floor cleaning robot) is outfitted with various dangerous items taped to it such as knives, cats, saw blades and blow guns.
"Dude what the fuck is that thing on your floor! It almost shanked me on my way in." "Oh dude, that's just my Doomba, it's a floor cleaning/home security robot, I'm going to enter him in Battle Bots next week"

The Doomba is excellent with getting away with its crimes as it cleans up after.
Doomba by The Lord of the Dance August 12, 2012
Word of the Day on September 10, 2025
the fiery hell-bat which will one day ascend from the depths of the inferno and swallow the souls of the iniquitous.
oh man, doombat just exploded out of that volcano and swallowed my grandma!
doombat by looloopuff April 10, 2008

doomtastic 

adj. 1) The mass media reaction to something so fantastically tragic, immediate and vast in scope that normal human emotional responses are insufficient, Like the Gulf Oil Spill, or the Haitian earthquake, or 9/11.

2) Movies or media based on disasters or war, sometimes called disaster porn.
Did you see 2012, volacnos and tsunamis and earthquakes! It was doomtastic!
doomtastic by Thor Conner September 25, 2010
That kid is a doombah
doombah by Chodie buttsus November 24, 2020

Doomgasm 

Orgasm like satisfaction directly resulting from one or multiple sources of ominous information.
Man, that thousand point dow drop just gave me a doomgasm.
Doomgasm by LATOC4LIFE May 20, 2010