For years I knew this as a bit of music-history xeroxlore. Only this year did I learn that it's music-history xeroxlore by Ezra Pound. Who knew?
Winter is icumen in, Lhude sing Goddamm, Raineth drop and staineth slop, And how the wind doth ramm! Sing: Goddamm. Skiddeth bus and sloppeth us, An ague hath my ham. Freezeth river, turneth liver, Damm you; Sing: Goddamm. Goddamm, Goddamm, 'tis why I am, Goddamm, So 'gainst the winter's balm. Sing goddamm, damm, sing goddamm, Sing goddamm, sing goddamm, DAMM.