The dirtiest, filthiest, most sexually repulsive act. It varies with each definition, all the constant response should be "don't be filthy". It can be described as a simple ATM or a Brown ATM with JAM, it could be any variation of a dirty sanchez, a dirty bucharian, a cleaveland steamer. But generally the worst thing one can think of.
Girl: I thought it was strange when he asked me for a french muddler...like he knew me or something.
A:What's a french muddler?
B:Don't be nasty yo.
A:What's a french muddler?
B:Don't be nasty yo.
by Daniil Lehrman June 4, 2010