When you fart out of your mouth. This happens when your anus is blocked, Usually by a log of poop. Your body is forced to push out the gas through your mouth. Often not pleasant because the jonafart can cause foul tastes in your mouth. They happen 5-10 times a year.
(Fart Sound) I farted out my mouth, Must of been a jonafart.
by ConnorFin22 December 18, 2011