Any person who is either stubbornly and willfully ignorant about electronics and computers, or who is genuinely too stupid to understand electronics, computers, or related concepts.
John: "How come I never got that e-mail from your mom?"
Steve: "She doesn't know how to do e-mail."
John: "Are you serious?"
Steve: "Yeah, she's a real technidiot, if you know what I mean."
when you're holding up your phone and making faces at it, as though you are taking a selfie, but you're really taking a picture of the person across from you or the wall or anything else that seems interesting but you don't want to be caught dead taking a picture of.
This action is often made more convincing by wiggling the eyebrows or opening the mouth, to pretend you're trying to get a Snapchat filter to work.