Douche Bag Index - Similar to the smog or pollen index, it's the ratio of douche bags at a particular location to the total number of people times 100.

For example, if there are 75 people in a room but 15 of them wear flatbilled hats, drive lifted F-150s, visit Glamis often, or are Boston Red Sox fans then the DBI in the room would be 20, (15/75) * 100.

*** Acronym coined by Mike K.
Douch Bags range in forms of FlatBiller, MMA TapouT posers, Fuck Stick, Glamis Bro, Bro Ho, Guido, or any other wannabe badass poser.

This place sucks! With the UFC fight on tonight the DBI is over 60 in here.
by malarrya May 7, 2009
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Dirt Bag Index. Multiply number of tattoos by number of missing teeth to find how many days since person's last day of bathing.

tn=b, where t is number of tattoos, n is number of missing teeth, and b is days since bathing.

Most commonly used unofficially in hospitals.
Nurse: Good Lord, this guy's DBI is 45, somebody get me the hose.
by Mister Boo September 13, 2009
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dumb bitch itis - a disease affecting people and making them stupid.
She should see a doctor, she has a massive case of DBI.
by Andrew Hime July 25, 2006
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Designated Bad Influence; a person of lesser morals who influences another's decisions in a negative way
Man, you're such a DBI! You totally let me get wasted and sleep with that dog last night.
by DoubleDoctorMcFugly January 27, 2011
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Acronym for Double British Invasion, i.e. when two Brits attempt to chat up a foreign chick at the same time.
Eric: Have you seen Jack and Ryan hitting on that Irish girl?

Harry: Yeah that's a serious DBI right there.
by gui77 July 28, 2011
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an acronym for drive by insult, where you open a car window and shout out an insult and/or racial slur. sexist slurs also acceptable.
Driver: "Hey, DBI this guy!"
by Drmrmysteryman July 11, 2011
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Teh coolest DB/Z/GT themed mud out there!
there's Lots of races, and cool quests and awesome players. The place really gives ya a feeling of enjoyment. Sometimes cooky and other times hilarious, ya never know what a day on DBI will be like!
Races include Saiyans, Icers, Kaios, Nameks, Bio-Androids, Halfbreed, Tuffles, Kanassians, Androids and also Fusion races!
DBI n00b1: "Man i just got PK'ed on DBI!"
DBI expert: "PK happens all the time."
DBI noob1: "WTF I Quit!"

Mudder1: "I'm looking for a new place to hang and kik ass."
Mudder2: "Try DBI its a really good place to kik some ass."
by anonymous575694 May 3, 2007
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