Fuck this shit while knowing what "this" is.

Shit.js

'use strict';

function Shit() {
    this.fo = 'shizzle';
}

Shit.prototype.fuck = function() {
    console.log('Fuck', this, 'shit!');
};




var thisShit = new Shit();

thisShit.fuck(); // will work as expected.
// it is being called in the context of 'thisShit'



var fuckWhateverImCalledIn = thisShit.fuck;

fuckWhateverImCalledIn(); // will break, error-out, or do something unexpected.
// it is being called in a different/undefined context than 'thisShit'



var fuckThisShit = thisShit.fuck.bind(thisShit);

fuckThisShit(); // will have 'this' be equal to 'thisShit'
// See https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Function/bind
// for more information.