gobbledygook
Concise Oxford English Dictionary © 2008 Oxford University Press:
gobbledegook /ˈgɒb(ə)ldɪˌguːk, -ˌgʊk/ (also gobbledygook)
▶noun informal meaningless or unintelligible language, especially when over-technical or pompous.
– origin 1940s (orig. US): prob. imitating a turkey's gobble.
'gobbledygook' also found in these Oxford entries:

