Where you walk into a room and soon as you walk in you forget what you went into the room for. You then wait whilst you remember what you have forgot to go in there for and this has been completely made up as rememgot a combination of the words forget and remember.
boy: i just got to go up stairs to get something.
boy 2: Ok
boy 1: Jeeeze what did i come in here for. (waiting trying to remember) Rememgot