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1.
Drunk-bff. Drunk best friend forever. The phenomenon that occurs when two people are best friends when drunk, however when sober, they have nothing to say to each other. They might even find each other completely boring when sober.
ex 1
Me and john are dbff's, we have so much fun at parties, but it's so awkward to be around him when we're sober.

ex2
I really want to talk to her right now, but we're only dbffs.

by hoyaplaya February 19, 2009
 
2.
diabetic best friends forever.
made famous by turk in episode six of scrubs season seven.
turk: 'we're dbffs.'
dr cox: 'hmm?'
turk: 'diabetic best friends forever.'
by dbff January 03, 2010