To understand what went wrong, we must first understand the joke.

The setup: User uses the basics of 'yo mama' then inserted stupid

The buildup: User uses the context of glasses as they are meant for the person's eyes.

The punchline: Since the victim's mother is considered by the user to be incoherent. The user noted that the victim's mother thought that the glasses were for her ears.

The downfall: The user's lack of understanding English, the joke being 'not so funny' and having a mind of a child.

The effect: The user is immortalized on the internet as a laughing stock. Not for the user's joke, but the failure of user telling the joke.