handy-dandy（adj.）
late 14c., handi-dandi, "a bribe," a reduplicated form said to be from hand; the second element has been connected with dandle, but that word is not recorded until 16c.
In modern use it is often merely an emphatic reduplication of handy. By 1590s the meaning "handshake" is recorded. As the name of a children's game by 1570s (though this is perhaps implied in the Middle English uses), sometimes as handy-pandy.
该词起源时间：14世纪末