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1.
Sophomoric: regarded as self-assured and opinionated but crude and immature. (See Greek sophos 'wise' and moros 'foolish'.)
Akash, the model for laziness and procrastination while being smart and knowledgable; also associated with "pied piper of slackerdom"
by My name is March 21, 2005
 
2.
A word one uses to try, and call someone else immature, but instead just ends up making themselves look like a pretentious douche bag.
Guy 1: The jokes on Tosh.0 are so sophomoric.

Guy 2: Dude you sound like a pretentious douche right now.
by aleis October 13, 2011