A popularly reported theory suggested euphemistic derivation from the phrase
by Our Lady. The contracted form
by'r Lady is common in
Shakespeare's plays around the turn of the 17th century, and
Jonathan Swift about 100 years later writes both "it grows by'r Lady cold" and "it was bloody hot walking to-day"
[4] suggesting that
bloody and
by'r Lady had become exchangeable generic intensifiers. However,
Eric Partridge (1933) describes the supposed derivation of
bloody as a further contraction of
by'r lady as "phonetically implausible". According to
Rawson's dictionary of Euphemisms (1995), attempts to derive
bloody from minced oaths for "by our lady" or "God's blood" are based on the attempt to explain the word's extraordinary shock power in the 18th to 19th centuries, but they disregard that the earliest records of the word as an intensifier in the 17th to early 18th century do not reflect any taboo or profanity. It seems more likely, according to Rawson, that the taboo against the word arose secondarily, perhaps because of an association with
menstruation.
[5]