Monotreme

[Greta]

A type of [mammal] that [lays] eggs instead of [giving birth] to live young.

[Cami]

A primitive mammal that lays large yolky eggs and has a common opening for the urogenital and digestive systems. Monotremes are now restricted to Australia and New Guinea, and comprise the platypus and the echidnas.

[Mary Mallozziberg]

Just as true [monotreme] are strange misfit animals whose parts are an awkward [fit like] [the platypus]; a mammal that lays eggs, oozes milk out of chest area with no nipples and webbed feet and bill like a duck, in urban parlance a person with a strange body that doesnt seem to fit together right like thick legs and tiny upper body is a [MONOTREME]