A Deku Nut is an item from the Nintendo 64 video game The Legend of Zelda: Ocarina of Time. It is a natural stun grenade created from the dried seed pod of a Deku Baba. In the game, the protagonist Link would find them early on in the Great Deku Tree's dungeon, where they would be required to kill the boss within the fortress.
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.