{"era":"current","word":"attaboy","meaning":"an informal exclamation of praise or encouragement","children":[{"era":"1900s","word":"that's the boy!","meaning":"the source phrase of praise or encouragement","children":[{"era":"1800s","word":"that is the boy","meaning":"the underlying phrase that was compressed into attaboy","children":[],"language":"English"}],"language":"English"}],"language":"Modern English"}