When someone talks down to you or belittles you because they feel as though they are a class or socioeconomic status above you and/or your actions.
Ewwww! Your drinking house swill? Remove it from my presence and bring me chilled Patron only! Yeah, I just thirdworlded you!
by ElRoTrio November 16, 2012
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noun

defines the underworld or netherworld, the world below.
The Devils realm is the thirdworld.
by Baron Neville October 15, 2018
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To severely degrade in quality or performance.
Man, that subprime crisis sure has the potential to thirdworldize the US economy.
by TomQ2 March 4, 2009
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