noun
long torso and short legs; long-bodied and short-legged
Descriptive noun for a body proportion where the torso is long relative to the legs. Often used in physical descriptions of people or animals.
彼は胴長短足だから、ズボンの裾上げが必要だ。
Because he has a long torso and short legs, he needs his trousers hemmed.
ダックスフントは胴長短足の犬種だ。
Dachshunds are a dog breed with a long body and short legs.
Compound of 胴長 (long torso) and 短足 (short legs). The exact historical derivation is uncertain, but the meaning is transparent from its components.