A superficial effort made without care or enthusiasm. For example, I haven't time to do a good job of vacuuming, just enough for a lick and a promise. This expression is believed to allude to the quick lick a cat or other animal might give itself and a promise to do more or better at some future time. [Mid-1800s]

The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Company. All rights reserved.