thingmahoobie
Noun. An object that you can't remember what it's called. You say "thingmahoobie" in lieu of the object's name.
Person A: Where's the thingmahoobie you use to turn on the television set?
Person B: You mean the remote control?
Person A: Yes. The remote control. Where is it?
Person B: In my hand.
Person B: You mean the remote control?
Person A: Yes. The remote control. Where is it?
Person B: In my hand.