Edit in JSFiddle

//extend the A object with Backbone.Events methods
var A = _.extend({name:'A'}, Backbone.Events);

//Add an event to A and callback function to be invoked when event is triggered 
A.on('whatsMyName', function () {
    console.log(this.name); //this is A
});

//trigger whatsMyName event on object A, logs A
A.trigger('whatsMyName');

/*FYI passing on() a single object containing multiple events and callbacks is possible 
A.on({ callback1 : function(){}, callback2 : function() });
*/