Cell potato

A person too lazy to get off their ass and go see colleagues in the same office or building, who contacts them instead by cellphone.

At the watercooler....

Jon: Hey Sally, how's things?
Sally: Not bad. Got any weekend plans?
Jon: Well, I was thinking (phone vibrates) sorry, gotta check this. Hello? (looks around, sighs) I'll get one.
Sally: Who was that?
Jon: Bob. He wanted a cup of water.
Sally: But he is sitting right over there! What a cell potato...
Jon: What's a 'cell potato?'
Sally: Ever heard of Urban Dictionary?