When you have the image of the object in your mind but the word just doesn't come out.

-Mak Long let's go get something to eat from the fridge.
-Okay. Kita nak makan apa?
-Kusinero.
-Apa?
-Eh. Coropaso.
-Huh?
-Mamadello.
-What in the world are you talking about?
-The ice-cream...the ice-cream...hah! CORNETTO!
-Oh. Ada tu dalam freezer.