After eating gas inducing foods your stomach is bloated and painful. Sometimes confused with a poo baby. Later when relieving yourself you find only loud and obnoxious gases escape. Hence "gas baby".
My poo baby was a miscarriage. It was nothing but an angry gas baby.
by Cinnimon Jones August 19, 2011
When one has an intense bloating episode, and has trouble expelling the gas causing it, making the time consumed and effort spent trying to expel said gas gets so intense it can be compared to a woman in labor.
I shouldn't have eaten all that cheese. I feel like I'm about to have a gas baby
by Drich94 November 07, 2015