What does "take matters into one's own hands" mean?
Native speaker’s answer
Rebecca
To "take matters into one's own hands" means to deal with a problem on one's own or by oneself, because the people previously dealing with the problem had not solved it and failed. Ex: When the cops failed to solve the crime he took matters into his own hands. Ex: They took too long to make dinner so we took matters into our own hands and made it ourselves.