break neck

break one's neck (to do something)

and break one's back (to do something)

Fig. to work very hard to accomplish something. I broke my neck to get here on time. There is no point in breaking your back. Take your time.

To make the utmost possible effort.

Name	Pronounced	Usage
Marieke	mah-REE-kə	Dutch
Cadfael	-	Welsh
Iris	IE-ris (English), EE-ris (German, Dutch), EE-rees (Finnish, Spanish)	Greek Mythology, English, German, Dutch, Swedish, Norwegian, Danish, Finnish, French, Spanish
Busby	['hʌzbi]
Mccoy	[mə'kɔi]
Zakiah	-	Arabic