something I've never been able to figure out is whether MLP is an actual descriptor so there are My Big Coldbloods out there in the ponyverse or whether these are honorifics so 18 hh MLPs are still MLPs.
@Leucrotta In MLP:FIM, the leaders of Equestria are significantly larger than average ponies and have more horsey proportions, such as Princess Celestia who sometimes refers to her subjects with the phrase "my little pony[ies]". There are other equines elsewhere in the world, such as the "Saddle Arabians" who are depicted with full horse size and proportions. They never get referred to as "my little pony", and it's unclear whether this is size-related or because they're not Celestia's subjects.
@electrickeet thanks! I FIGURED you or Bax would have a canonical answer to that. Also the thought of “to me, my Little Ponies!” while doing the telepathy blob thing, comes to mind.
@Leucrotta Mmmm. My Big Pony