loose cannon in Finnish
loose cannon in Finnish
arvaamaton ihminen
(idiomatic, by extension) An uncontrolled or unpredictable person, especially considered liable to cause unintentional or indiscriminate damage.
kävelevä katastrofi
(idiomatic, by extension) An uncontrolled or unpredictable person, especially considered liable to cause unintentional or indiscriminate damage.