Þrymr (Old Norse: Þrymr, meaning ‘Uproar’ or ‘Din’) is the giant who steals Thor’s hammer Mjölnir and demands the goddess Freyja as a bride in exchange for its return — the central premise of the Eddic poem Þrymskviða. The Æsir refuse to give Freyja; Heimdallr proposes the solution of disguising Thor as a bride, with Loki as bridesmaid. Thor, dressed as Freyja, travels to Jötunheimr. The disguise nearly fails when Þrymr notices the ‘bride’s’ monstrous appetite and burning eyes — Loki deflects each suspicion with improvised explanations. When Mjölnir is brought forth to hallow the bride, Thor seizes it and kills Þrymr along with all his assembled kin.

Þrymr’s character in the poem is comic as well as antagonistic. He is described as ruler of the jötnar (þursa dróttinn) at the poem’s opening. Þrymr appears in no other primary source and has no independent mythological narrative outside Þrymskviða.