A loudmouth, someone who habitually says it like it is and some. Also implies a gossipy context to whatever is announced.
Probably Lancashire dialect or urban slang.
He is kind, smart, funny, sarcastic , and everything you could possibly want in a person. Not only did he save his best friends but, he saved THE ENTIRE TOWN! Not to mention the fact that he is hot as hell!! He is a loveable dork who will definitely win your heart! And he is played by the to perfect for this world actor Dylan O'Brien