1)Sexual intercourse wherein one goes all out with no regards for who the partner is or what the act may be.
2.) Sexual promiscuity (particularly among males) which thereby suggests popularity for masculinity or sexual prowess. The idea of a man-whore, though in a more positive and successful light.
Coined by Matt Sims of the band Citizen King.
"I'll take it all over, jalopy style"
"Yeah, man. That dude gets around, if you know what I mean. He goes jalopy style around here."