Papa Wolf/Music

Rodney Atkins' 2008 No. 1 country hit "Cleaning This Gun (Come On In, Boy)," about an ultra-protective father of a teen-aged girl who -- on her date night -- makes sure he's polishing a shotgun in full view of her young suitor when he shows up for the date. The father and young boy have a conversation, before he makes a sly remark about the gun ... and suggests to the suitor that he will bring her home in pure condition, or else. (The implication is that the father does not want to hear of the two having sex or involved in other misbehavior, or else the boyfriend will regret it.) To make sure the boy holds to his promise, he'll be sitting up until she comes home, and he'll still be "cleaning this gun." The first verse has Atkins tell the story from the viewpoint of the teen-ager meeting his girlfriend's father, before moving forward into his adulthood, where he has to make the same speech to his daughter's boyfriend.
Nickleback's song "I'd Come for You".
Eminem. Don't fuck with his daughter or his evil alter ego Slim Shady will kick your ass.
The Reign of Kindo's song "Breathe Again" is about one Papa Wolf who, upon discovering that his kids' Christmas presents were stolen from the tree on Christmas Eve, tracks down the thief, murders him in cold blood, and brings the presents back to his kids. Delivered in a mellow jazz-rock melody.
"I Will" by Radiohead. According to Thom Yorke:

That's the angriest thing I've ever written. Almost inexpressible rage. Someone fucks with my family, I'm gonna kill them. That absolutely primal "you can do anything you like, but if you do that I'm not responsible for my actions"