A coma baby is a child (usually a baby) birthed whilst the baby mama is in a medically induced coma. The baby's mother is normally "sleeping" for the duration of their ninth month of gestation (that means pregnancy). Side effects may include: drowsiness, loss of virginity, gingerness, and anal leakage.
Caution: Do not attempt to operate heavy machinery while in coma. Coma babies should drive forklifts or any other SUVs of minivans fresh out of the oven
Mother (while sleeping): I'm in a medically induced coma in order to have a pain free delivery!