A vinegar baby is a device used to introduce a stream of vinegar and water into the body for medical or hygienic reasons. Most typically it takes the form of a rubber bulb and plastic nozzle.
"Hey Becky, can I borrow your vinegar baby? My taco is extra cheesy right now."
"Sure thing Susan, but you'll have to wipe the chocolate off it first."
"Sure thing Susan, but you'll have to wipe the chocolate off it first."
by Mother's Folly March 2, 2017