|Definition - A fashionable word that is used to impress rather than inform.|
Example - "The people at RealtyGuys have invented a new Real Estate paradigm."
Oxford English Dictionary - Its first citation is from 1946:
"Students at the Graduate School of Business Administration at Harvard University use a specialized vocabulary known as ‘buzz words’ to describe the key to any particular course or situation."
(Amer. Speech XXI. 263/1)