Chapter 1040

Chapter 1040 is titled "Wasted Words on Young Ears".

Cover Page
Germa 66's Ahh... An Emotionless Excursion, Vol. 4: "A creature beyond the power of science"

Niji and Yonji think about how they were defeated by Big Mom.

Short Summary
Big Mom withstands Kid's laser blast and tries to use Soul Pocus, which fails to affect Kid or Law due to their lack of fear. Law then creates a soundless area (much like Corazon's Devil Fruit power) around Big Mom, and as Kid forces her down a hole, Big Mom is left unable to call her homies to save her. She lands in the Armory and inadvertently triggers a bomb which causes Kazenbo to wither away and blows away the remaining ground behind her. Big Mom then proceeds to fall all the way to the Wano mainland, where she is left defeated in a huge explosion; the fighters around Law and Kid are left in awe and jubilation at their victory over an Emperor of the Sea.

The hole created by Big Mom allows Momonosuke to reunite with Yamato, and Momonosuke says that Zunesha is calling out to him, revealing that the elephant was once Joy Boy's companion.

Chapter Notes

 * Law and Kid's fight against Big Mom continues and concludes.
 * Kid's attack injures Big Mom, but she continues to withstand it.
 * Big Mom uses her Soul Pocus to try and take the life span of nearby members of the Beasts, Heart, and Kid Pirates, but Law and Kid are unaffected.
 * Law uses a new technique inspired by his benefactor, Rosinante, that silences Big Mom.
 * Kid's attack blasts Big Mom down the hole created by Law, who bisects Misery at the same time.
 * Big Mom passes through the weapons vault and accidentally sets off one of Yamato's frozen bombs, further injuring herself.
 * Big Mom falls into the crater on Wano Country alongside other explosives, where she falls victim to another, much bigger explosion.
 * Before her defeat, Big Mom implies that "some" of One Piece can be found in Wano Country.
 * The explosion in the weapons vault destroys the lower portion of Onigashima and is felt throughout most of it.
 * Kazenbo gets directly hit by the explosion and shrinks down in size.
 * The ground beneath Zoro crumbles and he begins to fall off the island.
 * Fukurokuju collapses from dehydration in his fight against Raizo.
 * Yamato manages to protect herself and the remaining bombs in the armory from the explosion set off by Big Mom.
 * Yamato approaches Momonosuke through a hole caused by the explosion as he continues to pull Onigashima away from the Flower Capital.
 * Momonosuke reveals that Zunesha was a companion of Joy Boy, and the crime it committed occurred 800 years ago.

Trivia

 * The title of the chapter is a reference to the Japanese proverb uma no mimi ni nenbutsu (馬の耳に念仏). The "horse" in the title is replaced by the kanji 新世代, which means "new generation". However, the reading of the kanji is given as ガキ (gaki), which is the word for "brats".