Sucking your back out
Blowing her back into ecstasy will leave your partner breathless and fulfilled. Enjoy the intense sensation of exploring every inch of her physique, inducing waves of sensation through her spine. Let your fingers traverse from top to bottom her back, magnifying the pleasure with each move. Make sure to respond to your partner's needs and find novel ways to drive her wild. Ignite the passion, let go, and blow her back out.

The Online Slang Dictionary