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1.
The act of inserting ones finger into ones anus, in order to derive sexual pleasure, and then being caught.
Person 1: "I totally just walked in on Dan giving himself a Dirty Daniel!"

Person 2: "Did he have his legs above his head like last time?"

Person 3: "Yup."
by scarred27 December 09, 2009
 
2.
a man notorious for the type/family/variety of fungii growing in his pubic region. also suffers from protein & zinc overload (hence gout and DSB - dangerous sperm build-up). Oh yes and horrendous BO :-).
'Look at that mongrel of a dirty Daniel!'
by Doink Doink May 15, 2006