bloody

Etymology 1

From Middle English blody, blodi, from Old English blōdiġ, blōdeġ (“bloody”), from Proto-West Germanic *blōdag, from Proto-Germanic *blōþagaz (“bloody”), equivalent to blood + -y. Cognate with Dutch bloedig (“bloody”), German blutig (“bloody”), Danish blodig (“bloody”), Swedish blodig (“bloody”), Icelandic blóðugur (“bloody”). See Wikipedia for thoughts on sense evolution.

adj

1. Covered in blood.
   All that remained of his right hand after the accident was a bloody stump.
2. Characterised by bloodshed.
   There have been bloody battles between the two tribes.
   The story of Elizabeth Bathory is one of the bloodiest in history. 2007, Lucinda Mallows, Lucy Mallows, Slovakia: The Bradt Travel Guide, page 169
3. (informal, Britain, Ireland, Newfoundland, Australia, New Zealand, South Africa, India, mildly vulgar) Used as an intensifier.
   Traffic in central London was a bloody mess this morning.
   There seems to be something wrong with our bloody ships today. 1916 May 31, David Beatty during the Battle of Jutland
   Try to keep those bloody women's bloody heads on their bloody shoulders by somehow helping them make this whole mad impossible scheme actually work. 1994, Robert Jordan, Lord of Chaos, page 519
   You are not to go asking anyone about who killed that bloody dog. 2003, Mark Haddon, The Curious Incident of the Dog in the Night-Time, page 64
   “You bloody fool, I could′ve stabbed you in the heart,” David said in mock anger, and then smiled widely. 2007, James MacFarlane, Avenge My Kin, Book 2: A Time of Testing, page 498
4. (dated) Badly behaved; unpleasant; beastly.

adv

1. (informal, Britain, Ireland, Newfoundland, Australia, New Zealand, South Africa, India, mildly vulgar) Used to express anger, annoyance, shock, or for emphasis.
   "Dice are no bloody good," David said. 1994, Robert Jordan, Lord of Chaos, page 109

verb

1. (transitive) To stain with blood.
   The butcher often bloodied his apron in the course of his work.
2. (transitive) To draw blood from (one's opponent) in a fight.
3. (transitive) To demonstrably harm (the cause of an opponent).

Etymology 2

Clipping of bloody mary

noun

1. (informal) bloody mary