I love the old Screwball comedies like "Bringing Up Baby." The characters in those typically were fast-talking, witty, and playful.
Even if your script or novel isn't populated with those kinds of characters, often it's easy and fun to slip in at least one.
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If you'd like to be inspired in terms of their dialogue, a great resource is the 1913 edition of Webster's Dictionary, which is easy to access online here:
websters1913.com
A conventional character might call someone a crook.
One who expresses himself or herself in the screwball tradition, however, might say, "You, Sir, are knavish, fraudulent, and unjust. You have made a U-turn on the path of rectitude."
Even if there's no room for such a character in your project, spending 30 minutes randomly browsing 1913 definitions will give you more joy than an equivalent period on Facebook!
