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An imagnary part of the body in Rainbow Six 3 that cannot be harmed or seen in anyway , even from behind.
"The guy behind the door poped out and shot him in the back of the fibula."
by DaRkRaVeN3 August 21, 2005
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Steve: I thought you weren't coming? Your wife was raging!

Chris: I told her I was working till' close on the bar. A fibula but not too far from the truth, let's rage!
by Alexandaaar August 17, 2010
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