Term often used by teenagers in the 60's. Very much like queef is used today.
A combination of the words vagina and fart.
I sneezed so hard that I accidentally varted at the same time.
Matt: "What'd she do, son?"
Jake: "Well I thought she was a breezy until she straight up flapped her wings and let out a steaming vart bro"
Matt: "Damn, son."