"Hair of the Dog" is the title track of Nazareth's 1975 album Hair of the Dog. It is sometimes called "Son of a Bitch" because of the repeated lyric in the hook ("Now you're messing with a son of a bitch"). The song is about a charming and manipulative woman who can get men to acquiesce to her every need. The singer is letting her know that she has met her match in him, and she won't be able to push him around.
^Strong, Martin Charles; John Peel (2004). The great rock discography. Canongate. p. 1064. ISBN978-1-84195-615-2.
^Brewster, David M. (2003). Introduction to guitar tone & effects: an essential manual for getting the best sounds from electric guitars, amplifiers, effect pedals, and digital processors. Hal Leonard Corporation. p. 60. ISBN978-0-634-06046-5.