After Goku brought down Muscle Tower, the Red Ribbon Army knew precisely how powerful he was. It didn't stop them from sending troops and their generals to kill him. It all came to a head after they hired Mercenary Tao to kill him. Tao killed one of Goku's friends. In turn, Goku went after all the Dragon Balls and took out the Red Ribbon while he was at it.
Mercenary Tao thrashed Goku the first time they fought and would have killed him if his final attack hadn't been blunted by the Dragon Ball Goku was carrying.
Cell does this to Gohan during the Cell Games. In an odd variation on the trope, Gohan at the time was hardly a match for Cell. Cell kept pressing his Berserk Buttons so he'd unleash his hidden power and be a Worthy Opponent. Cell underestimated just how worthy he'd be.
Doesn't count. At the time of the bullying, Cell was clearly the stronger of the two. he knew Gohan would get stronger. He didn't know he could get that stronger. For that matter, neither did Gohan. If anything, it's a case of Nice Job Fixing It Villian.
Before then, the Royal Army tried to kill Cell during the period before the Cell Games. This is despite knowing that Cell could destroy a city. It ends the way you expect.
This was more desperation than any sort of power play. They threw everything they had at Cell.
Gotenks thought he could take Buu easily and mocks him for being ugly and fat. Buu responses by beating his butt into the ground. While Gotenks is badly hurt, the military tries to attack Buu. Gotenks tries vainly to warn them to stop. Buu obliterates the army.
It was shown Gotenks had the power to take Buu down, but wasted time on flashy "cool" moves and taunts.
Chi-Chi slaps Buu in the face and yells at him due to being given false information of Buu apparently being responsible for Gohan's death. What's his response? Turning her into an egg and crushing her. Especially stupid since mere seconds ago, Buu had wiped out the entire human race with one attack, and Chi-Chi saw him do so.
Chi-Chi was clearly hysterical here, thinking Buu had just killed her son.
She herself is a victim of this in a filler episode. After she throws Mr. Shu out after he insults Goku and harms her son, Mr. Shu yells at her until she chases him, warning him to never return.
This is Mugging the Monster: Mr. Shu had no idea how strong either of them were, and his yelling was more in outrage at Chi-Chi having dared manhandle him.
In Battle of Gods, Bulma angrily chews out Beerus for spoiling her birthday and slaps him across the face. Keep in mind that Beerus is the God ofDestruction and The Dreaded even for Shenron himself, and Bulma just saw him effortlessly curb-stomp all of the Z-Fighters, including Vegeta, with her own eyes. Thankfully, she gets off with nothing more than an Armor Piercing Slap.
Again: Hysterical anger, not malice.
Goku even invokes this in Resurrection 'F', telling Vegeta that they have to go back to Earth right away before Bulma does or says something stupid to piss Frieza off.
Doing something stupid =/= Bullying
In Resurrection 'F', Frieza's men sees Frieza taking on the Super Saiyan again as this. Tagoma tells Frieza point-blank to leave Goku alone. He didn't live very long after speaking up.
Pruned some of the entries under Dragon Ball:
Mercenary Tao thrashed Goku the first time they fought and would have killed him if his final attack hadn't been blunted by the Dragon Ball Goku was carrying.
Doesn't count. At the time of the bullying, Cell was clearly the stronger of the two. he knew Gohan would get stronger. He didn't know he could get that stronger. For that matter, neither did Gohan. If anything, it's a case of Nice Job Fixing It Villian.
This was more desperation than any sort of power play. They threw everything they had at Cell.
It was shown Gotenks had the power to take Buu down, but wasted time on flashy "cool" moves and taunts.
Chi-Chi was clearly hysterical here, thinking Buu had just killed her son.
This is Mugging the Monster: Mr. Shu had no idea how strong either of them were, and his yelling was more in outrage at Chi-Chi having dared manhandle him.
Again: Hysterical anger, not malice.
Doing something stupid =/= Bullying
Insubbordination =/= Bullying.
My name is Freezer and my anti-drug is porn.