Bully (2018) online

Jimmy is a quiet, heavy-set high-school kid who is constantly tormented by the resident school bully Miles and his cronies. After an altercation on his way home from school lands him a chance meeting with former professional boxer "Action" Jackson, Jimmy decides to learn how to defend himself. He hits the boxing gym and with the help of a colorful cast of friends around him, they prepare to end the unsuspecting bullies' reign over the school