Mach Dammit
A Southern way to say you're so fast it's almost disrespectful and you're probably showing off.
I got to the door before the door even opened. Mach Dammit, I'm a machine.
He ran past me like I was a slowpoke. Mach Dammit, I'm not slow.
She moved like she had a speed demon in her. Mach Dammit, I'm tired.