When your girlfirend is so incredibly poor in bed that she makes the same amount of effort as a corpse - you do, in fact, end up 'basting the meat', similar to the act of stuffing a turkey. The sex is usually so poor that the male in the relationship is unable to finish, due to the cadaver like nature of his missus. He is left with painful, swollen blue balls.
Alex: "Oh mate, were you basting the meat last night?"
Henry: "MATE, she was like a corpse, minimal effort"
Alex: "Mate, did you finish?"
Henry: "Nah mate, blue balls, never have finished!"