Source : Webster's Revised Unabridged Dictionary (1913)

Truculent \Tru"cu*lent\, a. [L. truculentus, fr. trux, gen.
   trucis, wild, fierce: cf. F. truculent.]
   1. Fierce; savage; ferocious; barbarous; as, the truculent
      inhabitants of Scythia. --Ray.

   2. Cruel; destructive; ruthless.

            More or less truculent plagues.       --Harvey.

Source : WordNet®

truculent
     adj 1: defiantly aggressive; "as truculent as a small boy who
            thinks his big brother can lick anybody"
     2: aggressively hostile; "a truculent speech against the new
        government"