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When a person doesn't speak out loud for an entire day but still manages to communicate regularly.

Becomes even more of a phenomenon when nobody notices that the person hasn't spoken

A sign of being a Zombot
Man 1: "Ted has worked here for weeks and I just realized I've never heard his voice."

Manuel: "Yea, He's taken a vow of Wifilence."
by RolandoPico April 19, 2011
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