Top Definition
An elite squad from the Guatemalan army that specializes in counter-guerrilla attacks, counter terrorism and they are so good at what they do that even the green berets and marine recons go to North Guatemala ( peten) for training.

They were also considered the war dogs of the army during the civil war from early 1960-1996. They were charged with genocide, but they are known to be one of the best elite forces in jungle warfare.
He's a badass...he's a kaibil" " don't fuck with him
by drsbbj March 10, 2011
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