Meta-gaming is, more widely, using OoC information as the player, resulting in the character having access to knowledge (or just instinct) - as you put it, telepathically knowing what your character is thinking - that they shouldn't have access to.

I'm of the opinion that a little bit of meta-gaming is necessary to have your character in the right time in the right place for the story, but done carelessly, it feels really annoying, as you know.