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. [Mid-1900s]

Common Names:

Name	Pronounced	Usage
Stace	-	Medieval English
Zorka	-	Czech, Slovak, Croatian, Serbian, Slovene, Bulgarian, Macedonian
Neville	NEV-əl	English (British)
Gottfried	GAWT-freet	German
Fredric	FRED-rik	English
Columban	kə-LUM-bən (English)	Irish