Metagaming Bob is implied to be a player who metagames, so they intentionally use game knowledge to improve their odds of winning. If for instance they were to fail an insight check, they would choose to break character and act suspicious of the person who they failed insight on, even if their character should have no reason to suspect them.

found the barbarian

When a metagamer knows if the bluff is a bluff, they tend to act like the PC knows it's a bluff, even if it wasn't. (As an Example)