use (one's) noodle

To use one's own intelligence and intellectual ability; to think logically and rationally. ("Noodle" here is slang for head or brain. Often said as an imperative.) Come on, Dean, I know you can figure this out on your own. Use your noodle for a change! I can't believe you were arrested for selling marijuana. What were you thinking? Why don't you use your noodle once in a while?

Common Names:

Name	Pronounced	Usage
MirosŁAw	mee-RAW-swahf	Polish
Pisti	-	Hungarian
Siavash	-	Persian, Persian Mythology
EvŽEn	-	Czech
Adey	['ædi]
Lluc	-	Catalan