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4.
A nickname for Dannevirke, a town in New Zealand.
The Big D is really not very big at all!

We were travelling in the car and I fell asleep for a moment ...and when I woke up I realised I'd completely missed The Big D!
by Bloopy September 22, 2005
 
1.
the big d is a short term of the big dick and can be used to imply that people want it
1- hey dude
2- shut up
1- just cuz i have the big D and you want it
2- so did your mom last night
by angelnotangle January 08, 2013
 
2.
Slang for "depression", particularly the type of depression that is exaggarated for attention.
"Hey man...I've seriously got depression."
"What?"
"Yeah...I mean it this time....I've got The Big D..."
by Jimmy Piper September 21, 2007
 
3.
1. Slang for Denny's Restaurant, aptly named for it's symbiotic relationship with diahrea, the other Big D
Let's roll over to The Big D for some eats after we throwdown tonight.
by Tattoosleeve December 16, 2008