You cannot talk! One more word and I will feed you to my children. I'm kidding. We are vegetarians.
~ M'Baku to Everett K. Ross about to silence him in a funny way.
Witness the might of the Jabari first-hand!
~ M'Baku to the Border Tribe.
Lord M'Baku is a major anti-hero in the 2018 Marvel superhero film Black Panther. He is the brutish leader of the Jabari Tribe who tries overthrowing T'Challa/Black Panther in order to rule over Wakanda. He later returned as a major character in Avengers: Infinity War and a supporting character in Avengers: Endgame.
He is portrayed by Winston Duke, in his first film role.
As T'Challa has officially been announced king over Wakanda, there is a big celebration taking place. When people have stopped dancing and celebrating but haven't left yet, the Jabari Tribe can be heard chanting from behind. The tribe then enters the mountains, lead by M'Baku. He challenges T'Challa for the throne, and the fight begins. They are very equal in terms of fighting, with M'Baku almost winning. The crowd is obviously rooting for the new king T'Challa despite M'Baku barely having the upper hand. T'Challa counters M'Baku and now has the upper hand. He nearly kills M'Baku while strangling him at the waterfall, but when M'Baku is about to fall down, he gives up after T'Challa convinces him that his tribe truly needs him and allows him and his tribe to go free.
Though T'Challa proved to be a fair ruler, things get worse when Killmonger arrives to Wakanda after bringing in Ulysses Klaue's corpse, challenging T'Challa for the throne as he blames him and all of Wakanda for the death of his father Prince N'Jobu. Needless to say, Killmonger defeats T'Challa in combat and throws him down a waterfall to his seemingly death, declaring himself as the new King of Wakanda.
However, a near-dead T'Challa was found and rescued by a Jabari fisherman, who brought him over to M'Baku. Honoring what T'Challa has done for him, M'Kabu allows him to be healed by a special herb that T'Challa's family have saved for the occasion. Upon being told of Killmonger's plot to distribute Vibranium weapons around the world, M'Baku is unwilling to help at first, but he soon changes his mind by leading the Jabari tribe to help the Dora Mijale in warding off the treasonous W'Kabi and his men. Following Killmonger's death and W'Kabi's arrest, M'Kabu is shown to take W'Kabi's place as a new member of the Wakandan Council, symbolizing the unification of all five Wakadan tribes under T'Challa's leadership.
Avengers: Infinity War
M'Kabu returns in the film as he intends to help T'Challa and the other Avengers, with the aid of some members of the Guardians of the Galaxy in fighting off the infamous alien warlord Thanos and his army of the Black Order and Outriders from threatening the Earth. Unfortunately, despite their efforts in destroying the Black Order and Outriders, Thanos managed to defeat the heroes before using the six Infinity Stones to wipe out half of the universe's population. Though M'Baku has survived Thanos' slaughter, he is horrified to see T'Challa and several other Wakandan warriors (as well as several Avengers) disintegrate to their deaths while a triumphant Thanos escapes and oversees a sunrise from another planet.
M'Kabu returns in the film after all heroes who were wiped out by Thanos were revived by the surviving Avengers and Guardians of the Galaxy, aiding them alongside every allied force of Wakanda, Asgard, Ravangers and Masters of Mystic Arts, including the revived heroes, Pepper Potts/Rescue, and Carol Danvers/Captain Marvel for a final battle against the time-displaced Thanos and his army. Despite their triumph in defeating Thanos and his army, they had a couple of major casualties; Black Widow, who sacrificed herself to get a Soul Stone instead of Hawkeye, and Iron Man, after his heroic sacrifice using the stones to defeat Thanos and his army.
At the start of the movie, M'Baku appears to be a feral man who wanted nothing but destruction to everything but his tribe. This is proven wrong though as the movie progresses, and his personality is shown to be a more clever and funny guy. He is shown deeply caring for his tribe and doing anything to protect it, as well as helping those who aided him. He is also honorable, as he rescued T'Challa as a debt for sparing his life during their combat, even aiding him in stopping Erik Killmonger's plot to distribute vibranium weapons around the world.
Peak-human Strength: M'Baku has strength which is much more superior to that of a normal human. He is capable of lifting up humans with a single arm even without the heart shaped herb enchantment. He even managed to overwhelm T'Challa in their battle.
Expert Combatant: As a Wakandan warrior and the leader of the Jabari Tribe, M'Baku is highly skilled in melee and unarmed combat. He often utilizes his size, weight and strength in his fighting style; in his first confrontation against T'Challa, M'Baku nearly overwhelm and defeat the prince of Wakanda in ritual combat before T'Challa got the upper hand. During the Battle of Mount Bashenga, M'Baku was able to take on several Wakandan Border Tribe members all by himself relatively easily.