"Oth's Bride" is the Goddess Freya. This verse is about how the Giants often clamored for Freya and sought to win her as a prize.
On a more personal level this piece is about the feeling of being desired or wanted by other people, those who "like the giants" are outside your tribe, outside your inner circle; be it sex, art, business, or otherwise. It's about the obligations we choose and those we do not. Sometimes it feels like everyone is grabbing for you and if you're not careful you could be left stripped bare.