In the Poetic Edda poem Þrymskviða, the giant who claims to have stolen Thor’s hammer is Þrymr.
Þrymr hides Mjölnir and demands the goddess Freyja as the price for returning it. When Freyja refuses, the gods devise a disguise: Thor dresses as a bride, while Loki accompanies him as a bridesmaid. At the wedding feast, Thor’s enormous appetite nearly exposes the deception, but Loki explains it as the result of the bride’s long fast.
The plan succeeds when the giants place Mjölnir in the disguised Thor’s lap as part of the wedding ceremony. Thor immediately recovers the weapon and kills Þrymr and the assembled giants. This poem is one of the best-known comic episodes in the Poetic Edda.
Þrymr is sometimes rendered Thrym in English. The poem’s title is also transliterated Thrymskvida or Þrymskviða, and the differing spellings refer to the same Old Norse work.