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A person who insists on talking or texting but doesn't provide any meat to the conversation, thus wasting your time.
John: "I'm so fed up with Teresa; she's a total phone vegan."

Conversation of a phone vegan:
Teresa: Hi.
John: Hey, what's up? How have you been?
Teresa: Nuthin. Good.
John: ... That's good. What did you want to talk about?
Teresa: Idk.
by Captain Battletoads, Ph.D. December 13, 2012
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