Bloody is the adjectival form of blood but may also be used as a swear word or expletive attributive (intensifier) in Britain, Ireland, Canada, ... en.wikipedia.org/wiki/Bloody
Bloody Sunday (Irish: Domhnach na Fola) is the term used to describe an incident in Derry, Northern Ireland, on 30 January 1972 in which 26 civil rights ... en.wikipedia.org/wiki/Bloody_Sunday_(1972)