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one with a depressing, yet strangely upbeat, view of the world, often expressed through their sence of humor.
oswalt is the last name of famous comedian/actor patton oswalt. this term originally described jokes following his style of humor. it now also extends to people of his charicter, or people who have taken to using his jokes.
"dude...you just pulled an oswalt"
"you're such an oswalt"
by private brooklyn October 05, 2006