Тораның екі есемі: Таннгриснир мен Таннгнёстр

Pair of goats in Norse mythology

Tanngrisnir (Old Norse: , literal meaning "teeth grinder" or "one that grinds teeth") and Tanngnjóstr (, "teeth thin", or "one that has gaps between the teeth") are the goats who pull the chariot of the god Thor in Norse mythology. They are attested in the Poetic Edda, compiled in the 13th century from earlier traditional sources, and the Prose Edda, written by Snorri Sturluson in the 13th century. The Prose Edda relates that when Thor cooks the goats, their flesh provides sustenance for the god, and, after Thor resurrects them with his hammer, Mjölnir, they are brought back to life the next day. According to the same source, Thor once stayed a night at the home of peasant farmers and shared with them his goat meal, yet one of their children, Þjálfi, broke one of the bones to suck out the marrow, resulting in the lameness of one of the goats upon resurrection. As a result, Thor maintains Þjálfi and his sister Röskva as his servants. Scholars have linked the ever replenishing goats to the nightly consumed beast Sæhrímnir in Norse mythology and Scandinavian folk beliefs involving herring bones and witchcraft.

The Old Norse name Tanngrisnir translates to "teeth barer, snarler" and Tanngnjóstr to "teeth grinder". Scholar Rudolf Simek comments that the names were young when recorded, and may have been inventions of Snorri. Tanngnjóstr is sometimes modernly anglicized as Tanngiost.

Scholar Rudolf Simek connects Tanngrisnir and Tanngnjóstr with the beast Sæhrímnir (consumed nightly by the gods and the einherjar and rejuvenated every day), noting that this may point to sacrificial rites in shamanic practices. In Scandinavian folklore, witches who magically replenish food sometimes appear in tales, the food usually being herring. However, in fear that one would waste away if one were fed the same morsel again and again, folk tales describe the breaking of the herring bones when eating it as a form of precaution. Thematic similarities—bone breaking ending food rejuvenation—between this folk belief and the Old Norse tales of Tanngrisnir and Tanngnjóstr have led scholars Reimund Kvideland and Henning Sehmsdorf to highlight a connection between the two.

Tanngrisnir and Tanngnjóstr have been adapted in Marvel Comics as Toothgnasher and Toothgrinder. In the film adaptation of the Speed Racer manga franchise, there is a racecar named after Tanngrisnir, driven by Gothorm Danneskjøld, who is appropriately dressed as a Viking and sponsored by a company called Thor Axine, referring to the chariot. In the Yu Gi Oh Trading Card Game, both Tanngrisnir and Tanngnjóstr are represented as "Nordic Beast" Monster Cards. They are meant to be used in conjunction with other cards representative of other characters and creatures from Norse mythology, including their master Thor. In Rick Riordan's book Magnus Chase and the Gods of Asgard: The Sword of Summer, both Tanngrisnir and Tanngnjóstr appeared. They are called Marvin and Otis, respectively, in the book and they are commonly sacrificed by the god Thor, to be reborn the next day. In Heidevolk's song "Een met de storm", the "dondergod" (thunder god) rides in a "bokkenkar" (goat cart) over the clouds, alluding to Thor's two goats. In the 2018 video game God of War, the Grip of Tanngiost is a blade pommel that causes shock damage, which can be used on the Leviathan Axe. Both goats appear in the Danish Valhalla comics series, and the animated feature based on it. The god Thor butchers and cooks one of the rams but strongly warns against breaking the bones. Loki persuades Tjalfe (Þjálfi) into sucking the marrow from a leg bone from one of the goats. When Thor resurrects the goats the next morning, he finds that one of the goats is lame in the leg and becomes enraged. As a result, Thor maintains Tjalfe and his sister as his servants. Both goats appear in the game Super Auto Pets as Tandgnost and Tandgrisner. There is a food called the Yggdrasil Fruit that summons both of them.