What's the idea?

What's the (big) idea?

Inf. Why did you do that? (Usually said in anger.) Please don't do that! What's the idea? Why did you shove me? What's the big idea?

Name	Pronounced	Usage
Wei	-	Chinese
Shena	SHEE-nə	English (Modern)
Clyde	[klaid]
Summer	['sʌmə]
Iesha	-	African American (Modern)
Agassiz	['ægəsi]