The definition of grab the bull by the horns is:
(proverb) deal strongly with a difficult situation
A: What did you do when you lost your job?
B: I grabbed the bull by the horns and opened my own business. Now I’m a multi-millionnaire!
Now that her children are grown up, Maria is going to grab the bull by the horns and go to University.
A: I heard your boyfriend broke up with you.
A: What are you going to do?
B: I’m grabbing the bull by the horns and going clubbing tonight.
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