Question

کسی که... همش منم منم میکنه و از خودش زیاد میگه رو جدی نگیرین، تاکسی خالی زیاد بوق میزنه...

Answer 1

Don't take serious who blows his own trumpet 

Answer 2

Do not take serious those who always say "I"  and praise themselves.

Just because you yell and get loud doesn't mean you're right, it just makes you look like a loud wrong idiot.