To penetrate someone's anus repeatedly with either a penis, a finger or a sex toy.
"Please Mr. Griffin! Butt fuck me as hard as you can!!!!!! I need that big cock!!!! FUCK!!!!! Yes!!!! Fuck my ass!!! OH GOD~ Your cock in my ass feels so good!!!!!! CUM IN ME PLEASEEEEE!!! OHHH FUCKKKKKKKKK IM COMINGGGG!!!!!" Then he got off the bed and moved down my body, stuffing his cock back into my mouth. My ass felt so full, but then I felt him push his fingers back into my tight ruined hole... DADDY!!! I moaned. Him chuckling quietly made me so aroused, I just begged for him to fill me... As he did his first thrust, my ass grew even tighter, and my cum boiled up to my tip, my cock swelled with the strain of getting so hard. He didn't wait long, he just kept going harder and harder, then he yelled "YOU LIKE THAT YOU CUMDUMP? I BET YOU LOVE THAT YOU SLUT!! ANSWER ME WHEN I TALK TO YOU!!" I loved it when he talked to me like that, so I couldn't keep it in anymore. I came right on his face and he knelt down to clean my cock with his tongue. He did it slowly and gently and then sat back up . He took his cock in his hand and started stroking it.