Ass to Nipples 

When if your pregnant and lactating you squirt milk up your sexual partners' butt.

Sara and Nick totally went ass to nipples the other night. They said it was hot.

Ass to Nipples by Pika Pika May 22, 2007

nipple-to-ass 

a girl putting her nipple into a guys asshole in order for him to experience sexual pleasure.

guy 1: My girl gave me wicked nipple-to-ass last night. then i jizzed on her face

guy 2: My girl will only do that on my birthday! ...lucky bastard.

nipple-to-ass by ilovenippletoass January 11, 2010