What is the meaning of Bloody?

Covered in blood.

Characterised by bloodshed.

Used as an intensifier.

Badly behaved; unpleasant; beastly.

Used to express anger, annoyance, or shock, or for emphasis.

To stain with blood.

To draw blood from (one's opponent) in a fight.

To demonstrably harm (the cause of an opponent). (Can we add an example for this sense?)

bloody mary

Source: wiktionary.org