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It is when the girl has such big jugs that
she can use one breast to make a tunnel by folding it onto itself and then while you tf her she gives you a handy with her free hand.

It is called maljob since it originated with a girl named mallary.
"I can't wait to get my next maljob, it was like doublemint. Double the
flavor, double the fun."
by Kevin Calabro February 22, 2006