Something for something is an idiom that refers to a fair exchange or a quid pro quo agreement between two parties. In other words, both parties give something to gain something in return. There are several synonyms for this phrase including tit for tat, an eye for an eye, give and take, mutual benefit, and scratch my back and I'll scratch yours. These phrases all have a similar connotation, indicating a situation where both parties benefit from the arrangement. Whether in personal or business dealings, it is important to establish a sense of fairness and reciprocity in order to maintain healthy relationships.