1. To conceal something in the palm of one's hand, as when stealing. When we were kids we used to palm penny candies from the corner store all the time.
2. To receive something discreetly or in secret. It turns out that the governor had been palming percentages of profits from companies she'd given preference to. We're supposed to pool our tips and divide them at the end of the night, but it turns out Daniel had been palming his the whole time.
See also: palm
tv. to conceal something in the hand as in a theft or the performance of a magic trick; to receive and conceal a tip or a bribe. The kid palmed the candy bar and walked right out of the store.