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Paying a certain person or organization to improve your standing with them or attain priveliges other wouldnt by not paying.
On the west coast of Canada it can also mean something of a sexualnature.
"To get that kind of job or promotion you would have to grease one's palms"
by Wade-o G August 31, 2009

Words related to grease one's palms

bribe greased palms payoff payoffs