A bully is an individual, usually male, who enjoys exercising power over those he feels are weaker or less intelligent than he. Psychologically, this is often one's attempt to compensate for their own personality defects or fears. It is not uncommon for a bully to have been the victim of bullying themselves, or of child abuse. Whatever the reasons may be, bullies always target those whom they perceive are weak, or those who are social outcasts. The nature of the bullying can range from a desire to humiliate to physical violence.
In the 1985 film Weird Science, two jerkwads named Ian and Max used to amuse themselves by tormenting two scrawny nerds named Gary Wallace and Wyatt Donnelly. Their antics included pantsing them during Gym class and pouring beverages over their heads at the mall.
On the 2014 version of The Flash, the main character of Barry Allen was bullied as a child in school by a tough guy named Tony Woodward. Years later, Barry learned that few things had changed, even after Tony became a Metahuman code-named Girder, he was always seeking out someone smaller and weaker and punch on.
In "The Pack" episode of Buffy the Vampire Slayer, there were four high school teenagers who were a group of bullies. They included Kyle DuFours, Heidi Barrie, Rhonda Kelley, and Tor Hauer. While on a field trip to the Sunnydale Zoo, they made fun of new student Buffy Summers, and antagonized a smaller student named Lance Lincoln.
A "mean girl" played by actress KylieRae Condon, appeared in the "Falling" episode of Supergirl in 2016. This obnoxious red-haired girl was a bully with a group of friends who used to pick fun of a younger girl named Laura for wearing a Supergirl costume to school. The real Supergirl overheard this incident while flying and came down and used her x-ray vision to peak into the girl's backpack and saw her name written on some of her school supplies. Supergirl greeted Laura, addressing her by name, and acted as if they were pals. The older mean girls were suitably impressed and left Laura alone.
In the Stars and S.T.R.I.P.E. comic book series, Travis Thomas was a student at Blue Valley High School. He was an unapologetic bully who would not only torment weaker male classmates, but the female ones as well. He developed a strong hatred for a new student, Courtney Whitmore, especially after Courtney showed him up in the school corridor in front of his friends. Secretly, Travis had a crush on Courtney's best friend, Mary Kramer. He used to write awful poetry and shove them into Mary's locker when she wasn't around. Courtney and Mary eventually caught Travis sneaking another love letter into Mary's locker, and Travis was deeply embarrassed.