Idiyappam, also known as string hopper, indiappa, noolputtu, noolappam, or ottu shavige, is a rice noodle dish originating from the Indian states of Tamil Nadu, Kerala, and Karnataka.

It consists of rice flour pressed into noodles, woven into a flat -like shape and steamed.

Idiyappam (Tamil: இடியப்பம்/இடியாப்பம், Malayalam: ഇടിയപ്പം), also known as string hopper, indiappa (Sinhala: ඉඳිආප්ප), noolputtu (Tamil: நூல்புட்டு, Malayalam: നൂൽപ്പുട്ട്), noolappam ( Tamil: நூலப்பம்/நூலாப்பம், Malayalam: നൂലപ്പം), or ottu shavige (Kannada: ಒತ್ತು ಶಾವಿಗೆ), is a rice noodle dish originating from the Indian states of Tamil Nadu, Kerala, and Karnataka. It consists of rice flour pressed into noodles, woven into a flat disc-like shape and steamed.

The dish also spread to Southeast Asia, where it is called putu mayam in Malaysia and Singapore, and putu mayang in Indonesia.