$200 word 

noun - a large, complicated word, often containing several syllables. The words usually have a complicated meanings, but sometimes are just used in place of shorter words to make the speaker sound more intelligent.

Entymology: Apparently, way back in the days of the 1960s, a game show known as "Password" had a celebrity giving word association clues to a contestant in order for them to say a certain word. After winning the main game, the contestants moved on to the "Speed Round" in which contestants were give 30 seconds to guess 4 difficult words, each being worth $50 in value. The fourth word was usually long or difficult. Since if you got all of them right you got $200, that last one before winning became the "$200 word".

John: I was masticating my delectables while staring into my girlfriend's troubled face. I asked her what was wrong, and she said, "Nothing". Even though I knew this was a fabrication, the look of versimilitude on her face told me otherwise.

Jack: Stop using those $200 words! You could of easily said you were eating dinner and your girlfriend was lying about something!

$200 word by Corn Flake December 7, 2006

$200 dollar word 

an educated or "big" word in place of a more common one used so one can try to appear smarter than they really are

Foo: I ventured to the marketplace and purchased many consumer goods.

Dirty: Foo all u did was go to tha damn sto and buy sum shit, that all u had to say...quit usin them $200 dollar words!!

$200 dollar word by Dirty November 29, 2004