Umi on WoW Ladies sees BOP, and automatically thinks Bind on Pickup. I was once driving around looking for a party, and had been playing WoW so much lately that when I realized I was lost, my first thought was to type /1 (without a computer in the car, mind you), and ask where the party was in General chat. No one was in the car, but I felt pretty stupid after having a thought like that.
And my favorite lately came from that post on boss quotes the other day. Here's what happened to commenter Thingy at work:
Person 1: "How about we get that stuff in next week?"
Person 2: "Too soon"
Me: "You have awakened me too soon, Executus."
*odd looks from the rest*
Me: *finally realises what I just said*
Funny. Where have you seen WoW in the world?