What is another word for jump on one case?
Pronunciation: [d͡ʒˈʌmp ˌɒn wˈɒn kˈe͡ɪs] (IPA) 
"Jump on one case" is a phrase that means to take action on a particular issue or problem. There are different synonyms that can be used to convey the same meaning, such as "tackle a matter," "address a concern," or "delve into a subject." Other potential synonyms include "take up a cause," "attend to a situation," or "resolve a difficulty." Additionally, phrases like "press forward with an inquiry" or "pursue a line of investigation" can be used to indicate that effort is being exerted to uncover more information about a problem. Whatever the phrasing, the point is to convey a sense of committed, active engagement toward finding solutions to a particular issue.
