What is the figure of speech that should be used to express contempt of something?

I tried this expression and I don't know if it is suitable for that context:

Main phrase:

You had proposed XXX to our team . (XXX is a tools for IT team)


You had proposed a project management tools which is called XXX.

closed as unclear what you're asking by FumbleFingers, Mari-Lou A, choster, RyeɃreḁd, tchrist May 11 '14 at 23:23

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How about "total bomb?"

bomb: informal : a disastrous failure: the new play was a total bomb!

"you had proposed a project management tool which is a total bomb."


If I understand what you are looking for, you may say:

You had proposed a project management tool which is a complete failure.

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