Its a term i coined myself (although its probably existed before hand). Basicly, are you always telling the person whose playing the game what to do and how to do it?
I ask this because my brother does it to me all the time and it can get really annoying

Personally i refrain from doing this, apart from the occational piece of advice if needed i let the person playing, well, play. And if they really need assistance, depending on the game, i'll give it a shot.