The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with grease the wheels
oil the wheels. Make things run smoothly, as in You can count on Ben to grease the wheels so we'll be waited on promptly. This metaphoric expression transfers literal lubrication to figurative.