*based from the words "telepathy" and "pathetic"
It is usually used as a punchline when someone tries to read another person's mind and fails to do so.
Teacher: Since you are all telepathetic, I will communicate the lesson to you all orally.
Psychic: I am telepathic and can read you mind, but only for a small fee.
(client pays small fee)
Client: so can you tell me my real name?
Client: so that makes you telepathetic!
"If I weren't so tele-pathetic I would have known where in Nebraska the accident was going to happen."
Then a coworker walks in laughing about the boss spilled coffee all over his shirt .
Sue asks Mary to pick a lottery ticket and Mary picks a loser.
Sue."Thanks Mary, you must be telepathetic!"