How to put ajax request inside function and call it when necessary?

I have an ajax request:

$.ajax({
type: 'POST',
url: '/get-result.php',
dataType: 'json',
data: 'pid=' + $(this).attr("id"),
success: function(response) {
$(".reviewee-fname").append(response['fname']);
$(".reviewee-lname").append(response['lname']);
    }     }); };

I want to be able to put this inside a function that waits for me to trigger it with a return call. I am not exactly sure how to word it, I am new to javascript and jquery. But basically, I want to trigger this ajax call with various different button clicks and instead of having to put the ajax call inside every button click event, I want to put it in a stand alone function so if I ever update it later I dont have to change it 5 times.
Heres an example of a click event Id like to call the ajax request function with. Thanks!

$(function() {
$(".task-listing").click(function() {
//Call Ajax function here.
});
});