kezét-lábát töri

Etymology
. lit. 'to break one’s hand [and] leg/foot', normally understood as plural (“hands, legs/feet”).

Verb

 * 1)  to bend over backwards, go to great lengths to make a great effort; to take extraordinary care

Usage notes
It can be supplemented with the word.

Conjugation

 * For the verb, see.
 * The nouns and  take the appropriate possessive suffix according to the subject of the sentence plus the accusative case suffix (optionally omitted, especially in the singular): -, -, -, -, -, -.