I am a native english speaker and never heard that. Now i have used something like "i havent seen him since he got married its like he "fell off". That is short for "fell off the face of the earth" meaning to no longer be around, to not know someones methaphorical. Location. Like if you get married and your wife doesnt let you go out. I know where you are but for the friends you have fallen off the face of the earth for us.