Suggestion for someone who talks a lot but says little [duplicate]

Solution 1:

You can use bloviate and its various forms:

a style of empty, pompous political speech particularly associated with Ohio due to the term's popularization by United States President Warren G. Harding, who, himself a master of the technique, described it as "the art of speaking for as long as the occasion warrants, and saying nothing". The verb "to bloviate" is the act of creating bloviation.
_{from wikipedia}

to speak or write verbosely and windily
_{from m-w.com}

Thus, "that response was a bloviation" or "he/she is bloviating."

Solution 2:

The google dictionary defines windbag as :

a person who talks at length but says little of value.

One can say "he/she is a windbag", though it is not clear that "he/she is windbagging" is proper usage.