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1 definition by Harry1977

When one masterbates with a dildo(originally with wooden dildo, but this is not necessary), up his/her (usually male and must have moustache)anus, and then pulls it out and whipes it on his moustache. This is known as a dirty moffatt.
Bradely gave himself a dirty moffatt last snowday
by Harry1977 February 23, 2007