Kangaroo definition, any herbivorous marsupial of the family Macropodidae, of Australia and adjacent islands, having a small head, short forelimbs, powerful hind legs used for leaping, and a long, thick tail: several species are threatened or endangered. A kangaroo word is "a word that contains its own synonym, with the letters to spell that synonym already placed in the correct order." Take, for example, a word like rambunctious . It contains its synonym raucous ( RA mb U n C ti OUS ) .
As a Mom who was able to Kangaroo her little 1 1/2 pound miracle for two hours every day, I have few words to describe my experience so that others can truly understand. You can liken it to a full term delivery where the baby is immediately placed on mom's chest, kicking and screaming, then quieting to look into mom and dad's face with wonder.
kangaroo (n.) "large marsupial mammal of Australia," 1770, used by Capt. Cook and botanist Joseph Banks (who first reported the species to Europeans), supposedly representing a native word from northeast Queensland, Australia, but often said to be unknown now in any native language.