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To spam your friend with the full lyrics of a song over a messaging app while you're chatting, like you're trying to force them to know the words to the song or you're just being a huge dork.
'I'm gonna E-Sing you this song because you don't know the words and it's embarrassing.'
'I'm sending you the whole song because I'm too lazy to just sing it.'
'I'm E-Singing you this song because I think it's the best song ever and you need to know it.'