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"OMFB" is an abbreviation of "openminded-fanboy"

An OMFB or openminded-fanboy (or Open Minded Fanboy) is a person who has an open mind without bias AND who promotes the fact that they have an open mind.
Johnny says "You always promote Macs but now you're promoting Windows"

Gerry replies "I'm an open minded person"

Chris butts in and says Gerry is an OMFB"
OMFB by ChrisTheFeral May 18, 2009
Related Words
That’s omfb
Omfb by Xleem January 30, 2021
That’s omfb
Your capping omfb
Omfb by Xleem January 30, 2021
OMFBJ...did you really lose all your clothes last night?!
OMFBJ by rickrar September 18, 2011

OMFBHCYDTTMIASA 

Oh my balls how could you do that to me I am so awesome
Christie: liar TELL me
Jon: I can't, it's a secret
Christie: OMFBHCYDTTMIASA
Christie: :(
OMFBHCYDTTMIASA by outwardbob August 5, 2012
caca: "do you like him?"

dada: "OMFBJ!!!!! he's the hotttest cookie i lick him up."
OMFBJ by hell's bells on wheels March 30, 2008