andy · noun1
From android + -y, coined by Philip K. Dick in his 1968 novel Do Androids Dream of Electric Sheep?.
Andy · proper noun2
Andy · proper noun3
Andy · noun4
Originates from the live streams of IRL streamer Ice Poseidon on the live streaming service Twitch in early 2017; comedian and actor Andy Milonakis frequently appeared on Ice Poseidon's streams before being supplemented by one Andy Martin, who was given the byname "Mexican Andy" to distinguish him from Milonakis—himself dubbed "Sitting Andy" in June. Subsequently, Ice Poseidon and his audience began referring to people who appeared on his streams by the name Andy and the term spread to other channels on Twitch by late 2017 as a generic name for any Twitch streamer.
Etymology from Wiktionary, CC BY-SA 4.0.