Jabero Share definition Flag To become extremely aggitated or angry over seemingly nothing. Can be used as a noun, i.e. going jabero, verb jaberoing, or adverb jaberoly. When drinking, Chris tends to go jabero when he doesnt agree with someone. Jabero by DirtyAl November 11, 2012 0 0 Get merch Get the Jabero mug. Buy Now — $32.95 See more merch