From his memorable fast-rapping vids to world-record breaking freestyles, Mac Lethal is one of hip-hop's most entrepreneurial minds. His current project, Rap Greeting Cards, adds to his already large canon of viral videos, and the latest freestyle has an irresistible setup.

Essentially, he asked fans to email him with "greeting card" requests, and one man -- Darryl from Ohio -- asked for a breakup song directed at his girlfriend.

Here's the outline, from Lethal's Facebook page:

Dear Mac,

Today I found out my girlfriend Nicole is cheating on me. How I found out was a little weird. I found a bowl of Honey Nut Cheerios in the sink. The thing is, she doesn't eat f***ing gluten.

I got suspicious and broke into her Facebook account while she was at the Taylor Swift concert, and discovered that she's cheated on me with 6 different guys! Please make a video that I can send to her as my way of breaking up with her.

Darryl from Ohio

p.s. SHE HAS NO IDEA I KNOW.

As you might guess, the results are hilarious. Lethal's excellent video production and direction sensibilities lead to plenty of silly moments in this quick jam, which rips Taylor Swift's "Blank Space" and runs less than two minutes.

Here's a sampling of the lyrics:

I used to think that it was only you and me
Stupidly
I would even give you the moon and sea
But I came home and found a bowl of Honey Nut Cheerios in the sink
And dammit, b----, you're gluten free!

Have a go:

And, since it's the season, let's throwback to Mac's days as the world's fastest-rapping Santa Claus:

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