From Longman Dictionary of Contemporary Englishtake the bull by the hornstake the bull by the hornsDEAL WITHto bravely or confidently deal with a difficult, dangerous, or unpleasant problem Nora decided to take the bull by the horns and organize things for herself. → bull
Examples from the Corpus
take the bull by the horns• Helena decided to take the bull by the horns and organize the show herself.• We decided to take the bull by the horns and go to court, instead of paying the fine. 