Slang definitions & phrases for lead with one's chin
lead with one's chin
To make oneself vulnerable: If you tell him that right away you'll be leading with your chin(1940s+)
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 lead with one's chin
Take a risk, behave without caution. For example, Gordon always says exactly what he thinks; he never minds leading with his chin. This term alludes to a boxer leaving his chin, a vulnerable point, unprotected.