1
general::
Badly bruised, as in That fall down the stairs left me black and blue all over. Even though multicolored bruises rarely include the color black, this term has been so used since about 1300.
American Heritage Idioms
2
general::
Phrase(s): black-and-blue
Fig. bruised, physically or emotionally. • I’m still black-and-blue from my divorce. • What is that black-and-blue mark on your leg?
McGrawhill's American Idioms And Phrasal Verbs