stuff.js

$('.something').on({
  click: function () {},
  mouseout: function () {}
});

// How do I shorten this?

$(document).on('click', '.something', function () {})
$(document).on('mouseout', '.something', function () {})

// Edit: answer:

$(document).on({
  click: function () {},
  mouseout: function () {}
}, '.something');