use one's head

Think, have common sense, as in Use your head, Martin. No one's coming out in this weather. This idiom uses head in the sense of "brain" or "intellect," a usage dating from the late 1300s.

Common Names:

Name	Pronounced	Usage
Timotheus	-	Biblical Latin, German, Dutch
Shemu'el	-	Biblical Hebrew
Monroe	[mən'rəu]
Yukiko	yoo-kee-ko	Japanese
Tami	TAM-ee	English
Venceslaus	-	Medieval Czech (Latinized)