tweener
tween er |ˈtwēnər ˈtwinər | ▶noun informal a person or thing considered to be between two other recognized categories or types: Price considered him a tweener, too small for a lineman and too big for a linebacker. • short for tweenager.
tween ¦er |ˈtwiːnə | ▶noun US informal a person or thing considered to be in between two other recognized categories or types: we're a couple of tweeners, born after baby boomers and before generation Xers. • another term for tweenager.