A word to be used when someone says something you didn't quite hear or
don't understand. This usage originated when a spelling bee
champion misspelled the word "scombridae" in a news interview.
"Scomberdae? Are you saying scomberday?" can be used if you want a
person to repeat him/her self or to show that you
don't understand.
Alternatively, "Oh, well I thought you were saying scombrdae," can be used to cover for a
mistake made due to misunderstanding.