on the ball (adjective) on the ball: alert
Sinonime: boisterous, disobedient,
disruptive,
drunk, fractious, indisciplined, intemperate,
noisy,
obstreperous, off-base, on-a-tear, out-of-line, out-of-order,
raucous,
rebellious, refractory, riotous,
rowdy, stormy, termagant,
tumultous/tumultuous,
turbulent, uncompliant, uncontrollable, ungovernable, unmanageable, unruly,
waywardAntonime: behaved, conforming, disciplined, manageable, orderly, well-behaved