Noun. The wagon that picks you up and takes you to Jack-in-the-Box.
Leroy "Man, I'm so hungry. I got a hankering for a Jumbo Jack."

Terry "Yo, me too. Where's that JackWagon at? I gotta get my grub on!"
by ElVagabundo December 11, 2010
receptacle for semen. insult meaning multiple ejaculations were released into said "jack wagon"
That jack wagon has a serious attitude problem.
by phabineus December 25, 2010
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