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: