lick off
1. To remove something by lapping it up with one's tongue. A noun or pronoun can be used between "lick" and "off." The animal licked the dirt and blood off its young. We sat licking ice cream off our hands in the hot summer sun.
2. vulgar slang To bring a woman to orgasm by performing cunnilingus. A noun or pronoun can be used between "lick" and "off."
lick something off (of) something
and lick something offto remove something from something by licking with the tongue. (Of is usually retained before pronouns.) The dog licked the grease off of the floor where the meat had dropped. The dog licked off the grease.