Chip baby 

Sticking a bag of chips up your shirt and claiming that you are pregnant with child.

Jon was due to give birth to a mesquite BBQ chip baby, but a swift punch to the gut led to the termination of the pregnancy.

Chip baby by SAD Adams January 19, 2007

chip baby 

A euphemism for fat.

Kevin: Wow, Gareth has quite the chip baby due.
Rach: Yes, though I think yours is further along.

chip baby by Sister Kevin September 15, 2013