be sold on something
be sold on (something)
To be confident in or convinced about something's viability, veracity, etc., often to the point of being enthusiastically supportive of it. I don't know, this plan still sounds pretty risky to me—I'm not sold on it yet. After seeing the presentation, I'm sold on this investment—let's do it!
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
be ˈsold on something(informal) be very enthusiastic about something: We were really sold on the idea.
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