When a man inserts an onion into a women's vagina, thus forcing the vagina to cry. (needs to be a whole WHITE onion, but the onion only needs to be inserted half way or more.
A vagina on the go, typically attached to a female who is either a girlfriend or wife who will proceed to have sexual intercourse with you at any specified time or place.
"I've got my vagona with me"
"I used to date a vagona. We had sex everywhere, even on my neighbor's pool table."