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1 definition by EinsteinsGirl

1.) An immature, insecure, childish, self pitying man who has no job, no friends, no motivation, no class, lives with his mother past 21 years of age and mooches off anyone around him.

2.) Someone who's penis is either so small or so thin, you can't even feel it. It can't even be measured on the 0-10 scale.
"Are Rebecca and Chris still dating?"
"Yeah but he's a total Dan. She can do so much better."

"How good was the sex?"
"UGH, it was a Dan."
by EinsteinsGirl January 31, 2012