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Mad Diesel is when you're so jacked you could bench press a donkey and still have energy to kick your cousin’s ass in the face.
Bro, I'm getting Mad Diesel this summer. You'll be eating my dust, literally.
I just got Mad Diesel and now I can bench 300. Your ass is my new side dish.
Mad Diesel? That's when I flex so hard my shirt rips and my mom yells at me.