1. noun, rude slang Abject subservience, flattery, or fawning, especially as a means of seeking attention, support, or approval. Enough with the ass-licking—just tell me what you really think. I know you're not doing well in math this year, but ass-licking isn't going to magically get you a good grade!

2. adjective, vulgar slang Displaying or indicating such abject subservience, flattery, or fawning. He surrounds himself with ass-licking cronies to make himself feel important. Look at all the ass-licking messages on the boss's birthday card.