Massive spoilers for Game of Thrones Season 6, Episode 5, obviously.
So in this week’s Game of Thrones, we finally found out what Hodor’s name means (right before he was torn to shreds). Hodor had previously been like a Pokemon, only able to say his own name, but this week we found out it was actually a contraction of “Hold The Door”, because of him foreseeing his own fate due to some time travel telepathic shenanigans (look, you’ve either already seen the episodes, or you don’t watch the show).
That plot point was set up six seasons ago, and took all this time to pay off. But someone guessed it on a message board all the way back in 2008. Here’s what a user called Myrddin said on the Asoiaf Westeros forum eight years ago
The poor guy is just asking someone to hold the door for him, since he's always carrying someone else around. After a while, "Hold the door" became "Hold the doorHold the doorHoldoorHodoor. Dammit! Hold the door!" His mind finally snapped, and now all he can say is Hodor.
That’s actually almost completely right, even if he did say it as a joke. 
[via Mashable]
