Not verbatim. But you can do window["（╯°□°）╯︵┻━┻"] = function() { return ... }; window["（╯°□°）╯︵┻━┻"]()
Edit: You can assign the property to be without quotes using a bit of a hack, you just can't call it.
var o = {}; // Creates a new object
Object.defineProperty(o, "（╯°□°）╯︵┻━┻", {value : "Please respect tables! ┬─┬ノ(ಠ_ಠノ)"});
//=> o = {（╯°□°）╯︵┻━┻: "Please respect tables! ┬─┬ノ(ಠ_ಠノ)"}