Being both smooth and cool at the same time, the term originates from internet-rapper Zach Sherwin's similarly named music video on made-up slang.
"Tom is such a subtile douchebag. He needs to learn from Zach, who's more Legato Gelato!"
by dNea October 26, 2013
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A slang term from Zach Sherwins song "legato gelato"

It means "keep it chill"
"hey bro, you gotta be more Legato Gelato"
by Bullerdude September 17, 2015
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