Top Definition
An informal or personal addition at the end of a letter or note written to a friend, acquaintance, or enemy.

Could also apply to a notation added to the end of scripting or coding in terms of a computer language or semantics.

Common known acronym is P.D.
(contents of note blah blah blah)
(name here)

P.D. (post data) I had a great time at dinner last night!
by k0nfl¡ct November 02, 2012

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