if an emotion, desire, or physical action is uncontrollable, you cannot control it or stop yourself from feeling it or doing it
I felt an uncontrollable urge to scream.
Mother burst into uncontrollable sobs.
someone who is uncontrollable behaves badly and will not obey anyone
The presence of some uncontrollable children spoilt the evening.
if a situation is uncontrollable, nothing can be done to control it or stop it getting worse