Having sex with a fat girl. The name speaks for itself.
Bob: Hey, so what's that Adele song about?
Adam: "Rolling In The Deep" is a euphemism for having sex with a fattie. Adele is pained because she thought the guy loved her, but instead just wanted a one night stand.
Bob: Ah, you can't blame him. Nobody would actually date a fat chick.
Adam: Indeed. He led her on. He had her heart and soul and played it to the beat.