Definition of -speak combining form from the Oxford Advanced Learner's Dictionary

 

-speak

 combining form
combining form
BrE BrE//spiːk//
 
; NAmE NAmE//spiːk//
 
 
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(in nouns) (informal, often disapproving) the language used by a particular group of people, especially when it is difficult for other people to understand or they find it annoying management-speak Visitors to websites don't want to read marketing-speak. His email was a nonsensical paragraph of management-speak. Unlike his colleagues, he avoids White House speak. The ‘finished goods inventory’—that’s Wall Street speak for unsold goods.
See the Oxford Advanced American Dictionary entry: -speak