The Deku Nut is an item from the Nintendo 64 video game The Legend of Zelda: Ocarina of Time and it's sequel The Legend of Zelda: Majora's Mask. It is a dried seed pod from a Deku Baba. Deku Nuts are filled with powder that detonates when thrown against the ground producing a bright flash of light. They can be used to stun or disorient enemies temporarily like a natural stun grenade. They are one of the first items obtainable and Link can find them early on in the Great Deku Tree's dungeon, where they are commonly dropped by Deku Babas. They can also be purchased at the Kokiri Shop.
The Deku Nut's ability is to stun enemies when thrown, after which Link will be able to attack the enemy.It is also the original way to kill Queen Gohma with it.
Super Smash Bros. series
Deku Nuts also appear items in the Super Smash Bros. series starting with Super Smash Bros. Brawl, where they can be thrown to stun opponents. Like other explosives the player throwing them can be caught in the blast and stunned if they are too close, so caution should be taken when throwing them.