Gigantic Hammer (ギガンティックハンマー) is a rush attack used by Broly in his Legendary Super Saiyan form. First, Broly strikes the opponent down with a massive clothesline. Then, he grabs the opponent by their shoulders and picks them up to vertical kick them up into the air. Next, he teleports in front of the opponent as he grabs them by their head and flies down to smash them across the ground. Finally, Broly picks up the opponent by their head, and punches them in the stomach, knocking them away up into the air, inflicting a huge amount of damage.
Broly used parts of this attack during his battles against Goku in the movie Dragon Ball Z: Broly - The Legendary Super Saiyan. While fighting Broly on New Planet Vegeta, Goku kneed Broly in the chin. However, Broly was unaffected and attacked Goku with the Gigantic Hammer rush's shoulder grab and vertical kick, kicking him up into a cliff. Later, after easily withstanding Goku's Super Kamehameha, Broly attacked Goku with the Gigantic Hammer rush's head grab and stomach punch, injuring and temporarily knocking him out of the fight. Broly also used part of this attack, the Gigantic Spike, during his battle against Gohan in Dragon Ball Z: Broly - Second Coming. Gohan flew up to punch Broly, the Broly was unaffected and attacked Gohan with the Gigantic Hammer rush's head smash, smashing him into the ground and causing the ground to collapse.
Gigantic Hammer was named in the Budokai Tenkaichi series and is one of Broly's Blast 2 attacks in his Legendary Super Saiyan form. In Budokai Tenkaichi 2, the attack only consisted of Broly punching his opponent up in the air, then he grabs them by their head, and dives for the ground at high speed before slams the opponent away with a destructive punch. Gigantic Hammer reappeared in Dragon Ball: Raging Blast and is also used Broly in his video game exclusive Super Saiyan 3 form.