Quid pro quo (Latin: "something for something"[2]) is a Latin phrase used in English to mean an exchange of goods or services, in which one transfer is contingent upon the other; "a favor for a favor". Phrases with similar meanings include: "give and take", "tit for tat", "you scratch my back, and I'll scratch yours", "this for that,"[3] and "one hand washes the other". Other languages use other phrases for the same purpose.