But all of that doesn't matter much when, in utter joy, she puts her little opossum tail on vibrate.
Instead, the opossum uses its tail as a brace and a fifth limb when climbing.
British Dictionary definitions for opossum
noun (pl) -sums, -sum
any thick-furred marsupial, esp Didelphis marsupialis (common opossum), of the family Didelphidae of S North, Central, and South America, having an elongated snout and a hairless prehensile tail Sometimes (informal) shortened to possum
Also called (Austral and NZ) possum. any of various similar animals, esp the phalanger, Trichosurus vulpecula, of the New Zealand bush
C17: from Algonquian aposoum; related to Delaware apässum, literally: white beast