Double goose or Double geese? 'double goose' is a specific term that relates to the feather filling in jackets. It is always singular. Examples: "My jacket is double goose", or "My jacket has double goose filling", or "I have 2 jackets and they are both double goose." Double room A 'double room' is an extra large room. Examples: "I booked a double room at the hotel." If I wanted 2 extra large rooms, I could say "I booked 2 double rooms". Double chins A 'double chin' refers to one chin (but it looks like 2 because of the rolls of fat) Examples: "That person has a double chin" "Those two people both have double chins".

What is "double geese" or "double goose"? This makes no sense to me., Difficult to comment or correct if it has no obvious meaning. . A pair of geese? Two geese?

'Geese' is the plural of goose. I would refer to one goose, to three geese, and so on. 'Room' and 'chin' are regular nouns. A 'double chin' refers to a layer of fat that looks like a second chin. A 'double room' is an informal term for a large room, perhaps in a hotel.