It's very fashionable is what I've just said (4,4)
I believe the answer is:
last word
I'm afraid I can't explain this answer.
Can you help me to learn more?
(Other definitions for last word that I've seen before include "this is finally put across" , "It's state-of-the-art" , "Amen" , "Final remark in argument" , "Most up-to-date - final decision" .)