(idiomatic) To sacrifice something of little value in the hope of gaining something better.

A person that has been harmed by something becomes more cautious about it.

A person of high rank or status has more problems than those of lower rank.

(simile) Synonym of sweat like a pig

(rhetorical question, colloquial) One should not do something that one has hired someone else to do.

Synonym of cross my heart and hope to die

Synonym of cross my heart and hope to die

(idiomatic) To give someone a rest. / (idiomatic) To stop harassing or demanding from someone. / (idiomatic) To provide someone with an opportunity for significant advancement.

(vulgar, idiomatic) Synonym of grow a pair

Certain things are appropriate on a certain time and place.