A way to say 'It doesn't matter' in the manner of the wrestler and actor, 'The Rock'. Said in a deep and slighly aggressive tone. Dothun madder can be used as a more polite form of 'shut up'.
John: "So do you have the anal bondage?"
Jim: "What? Anal bondage what are you...?"
John: Uh-0h wrong person, dothun madder!"
Jim: "What? Anal bondage what are you...?"
John: Uh-0h wrong person, dothun madder!"
by Phaidan October 25, 2006