break back

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Related to break back: break faith with

break (one's) back

To put forth a great deal of effort. I've been breaking my back trying to get a passing grade this semester, so failing by two measly points is incredibly frustrating. Don't break your back trying to please these people—they'll never appreciate it.
See also: back, break

break one's back

(to do something) Go to break one's neck (to do something).
See also: back, break

break your ˈback doing something/to do something

work very hard to achieve something: I’ve been breaking my back to sell as many books as I can. ▶ ˈback-breaking adj. (of physical work) very hard and tiring
See also: back, break, something
References in periodicals archive ?
The second set saw Almagro broken early to trail 2-1 but he levelled the set at 4-4 with a break back.
A BOOZY builder locked out of his flat accidentally hanged himself while trying to break back in.
While making the top cut, the branch will break back to where the undercut was made, without ripping off part of the trunk.
He gained one break back immediately and saved two match points in the 10th game of the set before Grosjean finally wrapped up a thoroughly deserved victory and set up today's intriguing clash of styles.
Britain's Rusedski lost 7-6 (8-6) 6-4 but had his chances by breaking the Slovakian's serve in both sets, only for Kucera to break back.
Nevertheless, some investors will want to see a clear break back above 50 before they set their sights on TGT.
From then on, it was the pint-sized Japanese star as she broke one more time in the eighth game and then saw her Spanish opponent save seven match-points to break back for 4-5.
He broke Soderling's serve in the first game and again in the third, only for the Swede to break back himself then save a break point in the next game.
The third set, obviously got broken back, won a long game the following game to break back.
However, inability to roll over from here, will negate our bearish outlook, with a break back above 1.