What is double-jeopardy?

Answer 1

Double jeopardy refers to a person being prosecuted again for the same offense (1) after having been being acquitted, [2] a second prosecution for the same offense after conviction; and [3] multiple punishments for the same offense.

However, if charges are brought by independently by state and federal governments, that has been found not to violate the Double Jeopardy Clause of the 5th Amendment.

It could also be the second round of the popular game show Jeopardy.
Double jeopardy is offered to everyone to whom it applies. It means that a defendant In common law countries, a defendant being tried for something cannot legally be held responsible for it after being convicted and sentenced by a court of law.