tweener

/ˈtwinər/
noun
  1. A person or thing that falls between two categories, not clearly belonging to either.
    • In tennis, a tweener is a shot hit between the legs, often used as a trick play.
    • The car was a tweener — too small for a family but too big for a single commuter.
    • As a tweener in the office, she handled tasks that were neither fully administrative nor fully managerial.
What does "tweener" mean? | whatsthatwordmean | whatsthatwordmean