Savvy us generally used to denote understanding of a concept, or
mechanic.
"He was savvy with the workings of the handgun"
"He had a savvy understanding of how it worked"
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a savvy scientist is a horrible scientist
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Right now the website Savvy does not sell anything. The site is
under construction as it says that both "Savvy for You!" and "Savvy
for Brands!" are coming soon.