Pobbing

Taken from the 80's TV show "Pob" where the title character blew spit over the TV screen and wrote his name in it. Although in this version when shagging doggy-style, just as you are about to ejaculate, you pull out and come on your partner's back. Then, write your name in spunk on their partner's back.

Andrew was pounding Karen hard from behind, just as he felt he was ready to climax he pulled out and spunked on her back pobbing her as he did.