Tooth and Nail

The speaker feels frustrated by people who criticize his relationship and say he is not good enough for his partner. As their comments grow more hostile, he responds with a bold promise: he will stand by the relationship and not let others separate them. The mood is defiant and protective, though the speaker also admits he was wrong at one point.

“Tooth and nail” is an idiom meaning to fight with all one’s strength and determination. Here, it emphasizes the speaker’s fierce loyalty rather than describing a literal fight. The image of others trying to “tear us apart” suggests pressure that could damage the couple’s bond. Likewise, “come between the two of us” means interfering in their relationship, not physically standing between them.

The lyrics present the speaker as committed, but they leave some uncertainty about how reliable he is. Other people accuse him of breaking promises and fooling around, and his admission, “I was wrong,” suggests there may be a real reason for their doubts. His confident claims that nobody can take his partner away may sound reassuring, possessive, or both. So the song can be heard as a declaration of devotion, while also hinting at tension and questions about trust.