it means basically 'cash and carry'... you pay someone cash on the spot (placing the cash atop a barrel that's for sale) and they in turn release the goods to you right then and there - and you carry it (the barrel) away!
I see that you're selling your car on line. Can I give you cash on the barrel head and I drive away with the title?
by muchomojo4u September 23, 2013
buy the domain for your pet blog