it's a combination between the words pussy and retard.
A pustard is a
guy who breaks up with his girlfriend after only a few hours, denies it all happened and dislikes Harry
Potter.
A pustard can also be many different things, but a true pustard breaks up with his girlfriend after only a few hours, denies it all happened and dislikes Harry
Potter.
you're such a pustard for hurting that
poor, beautiful, awesome girl in such a
cheesy way.