Gobbledygook 
 
Wordy and generally unintelligible jargon (Webster's New Encyclopedic Dictionary) 
 
Language characterized by circumlocution and jargon, usually hard to understand (Free Online Dictionary) 
 
Gibberish 
 
Pretentious or needlessly obscure language (Merriam Webster OnLine) 
 
Meaningless or unintelligible talk or writing (Dictionary.com) 
 
Jargon 
 
Confused, unintelligible language (Webster's New Encyclopedic Dictionary) 
 
Obscure and often pretentious language (Merriam Webster OnLine)