informal used as an intensifier esp to express annoyance
smeared with, stained with, or containing blood
Under the bludgeonings of chance my head is bloody, but unbowed — W E Henley
accompanied by or involving bloodshed
murderous or bloodthirsty
informal unkind or unpleasant
merciless or cruel
bloodily adv
bloodiness noun
Old English blōdig, from blōd blood1. The use of bloody as an intensifier dates back to the 17th cent., but its original connotations are obscure. Since the two earliest uses are both of bloody drunk, it has been suggested that this meant ‘as drunk as a blood’ (sense 6 of blood). Alternatively, it may be that the early combinations bloody drunk, bloody angry, bloody passionate all indicate a state in which there may be literally a rush of blood to the face. The oaths God's blood, sblood, blood may also have contributed to the sense, but there is no evidence to support the popular belief that it is a corruption of the oath by our Lady