var person = {
    name : 'Saucy Jack',

    convenienceHook : this.getName('some predefined string'),

    getName : function(string) {
        console.log(this.name + string);
    }
};

var person = {
    name : 'Saucy Jack',

    getName : function() {
        console.log(this.name);
    }
};

person.convenienceHook = person.getName('some predefined string');
person.convenienceHook(); //returns error