Why my 20 years old brother trying so hard to act like Conor McGregor?

He's 20 years old and been training mma since he was 18 and he would try so hard to act like Conor McGregor. Like he always says "who the fook is that guy?" Or "shut your fooking mouth" or stuff like "I'll whoop your ***" and it's out of control, he's so annoying... show more He's 20 years old and been training mma since he was 18 and he would try so hard to act like Conor McGregor. Like he always says "who the fook is that guy?" Or "shut your fooking mouth" or stuff like "I'll whoop your ***" and it's out of control, he's so annoying now.
Why he's behaving like this
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