drip baby 

When you fuck a woman in the ass and the cum drips into her pussy and makes a "drip baby"

John fucked Gena in the ass and 9 months later there was a drip baby!

drip baby by Ari Plaut September 22, 2006

Back Door Drip Baby 

A child conceived from the mother engaging in anal sex and allowing for the semen to drip from her anus into her vagina.

In order to achieve impregnation the male must first ejaculate inside of the females rectum. The female will bow her legs tilting her body forward. The female will then take her hand and gently spread a cheek allowing for the anus to expand and create a conduit for the semen to trickle down towards her pubic region. She will use her free hand to catch and vigorously rub the anal semen into her vagina.

Whats wrong dude?
I just found out I am a back door drip baby.
No way man!
Yeah, I guess mom was really into the anal cream pies back in the day

Back Door Drip Baby by Ritter the Critter November 16, 2011

drip down baby 

A human baby conceived as a result of the semen ejaculated onto a woman's body after hand job, most often used in the context of a shower handy where gravity causes the sperm to "drip down" into the woman's nether regions.

Swole Bro 1: Did you hear Mandy got pregnant?
Swole Bro 2: Yeah bro, Brock told me it was a drip down baby.
Swole Bro 1: No way brah! He's got some strong swimmers

drip down baby by branch9000 August 15, 2016