Rudram Namakam Chamakam (R.N.C.G.) is a devotional song based on Lord Shiva. It was written by Goswami Tulsidas in the sixteenth century in the Indian devotional genre of Bhajans. The song celebrates the divine love and compassion of Shiva, and has been used to invoke devotion in his divine spirit. It is also known as Rudram Laghunyasam.

The music is based on the rhythmic chants of the Vedic mantras. Each of the twelve stanzas is composed with a different set of notes and is concluded with a different melody. The overall effect is very mystical and pleasing. The words are written in the Tamil language.

The song is a part of a larger devotional poem called Rudram Namakam. It is written in the style of a classical poem. The structure of the poem is very unique and has been called “hammock kavitha”. This “hammock” is used to mark the beginning and the end of a poem.