Top Definition
Biggest Douche In The Universe - BDIU - An intergalatic comittie that elects the incumbent nominie for the "Biggest Douche In The Universe" Award.
From a SouthPark show spoofing John Edwards, The BDIU nomminates John Edwards, Cold Reading Pshycic, as the official winner of the "Biggest Douche In The Universe" Award.
by Michael Decaro September 26, 2006
Butt Dialling iPhone User

An iPhone user who accidentally calls people, usually when the phone is in their pocket.
"God she is such a bdiu, she need to figure out how to lock her keypad."

"I had to turn off the voice dialing feature because I was becoming a bdiu."
by semos September 25, 2011

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