This was posted in another site. Seems worth posting here.
The Phrase Finder 
 Home > Discussion Forum Home
                    Search the Discussion Forum Archives:
                                                                     
                    Browse the Archives 
                                                  Re: pat
                    Posted by bob on January 14, 19100 at 16:50:41: 
                    In Reply to: Re: pat posted by ESC on January 14, 19100 at 01:29:11: 
                    : : : 
                    : : : this is an assignment for one of my college classes and have not been able to locate anything on the
                    phrase "down pat" other than what it means. Any help is greatly appreciated. 
                    : : From the "Encyclopedia of Word and Phrase Origins" by Robert Hendrickson (Facts on File, 1997):
                    "stand pat. American poker players in the late 19th century invented this expression to indicate that a
                    player was satisfied with the original hand dealt to him and would draw no more cards. Where did pat
                    come from? One theory is that because the word meant 'in a manner that fits or agrees with the purpose
                    or occasion' or 'incapable of being improved' it was a natural for the poker expression. Another holds that
                    'stand pat' is a corruption of 'stand pad,' an older English expression meaning 'to sell from a stationary
                    position' and originally referring to peddlers who remained in a fixed location..." 
                    : : I just realized that you were asking about "down pat." I haven't found that yet. But if you'll look at the
                    word definition in the first theory, that might help. 
                    : PAT -- From “The Dictionary of Etymology: The Origins of American English Words” by Robert K.
                    Barnhart (HarperCollins, 1995): “pat2 adv., suitably. 1578, perhaps a special use of pat1 (a light tap), in
                    the sense of hitting the mark; and thus ‘opportunely,’ ready for any occasion.” 
                    One can speculate (and this is pure speculation) that the origin may well be in poker parlance. Every
                    poker player knows that feeling when one is dealt a pat hand: you glance at the 5 diamonds you've been
                    dealt, and it makes a vivid impression. You don't need to glance at it again and again to verify what you
                    have: you have it down pat.. Of course, amateur poker players give themselves away by behaving
                    differently when they have one kind of hand versus another. They look at it too often, or not often
                    enough, they lay it down in fornt of them instead of holding it, etc. (Poker players call these "tells,"
                    characteristic behaviors that give away a hand's strength.) Naturally, an advanced poker player will
                    strive to eliminate tells, or skillfully plant false tells to deceive. One way to reach a behavioral
                    consistency is to spend the same amount of time examining your cards each time, regardless of its
                    content. To memorize (get down pat) the cards at the same pace, with the same hand movements, with
                    the same poker face. (I play poker against one fellow who changes his rate of breathing when he gets a
                    good hand...) 
                    Follow Ups:
 http:// phrases.shu.ac.uk/bulletin_board/2/messages/183.html - last updated: 18 November 2001 - visited 287 times