The spelling of "stomach steinway" may seem unusual, but it actually accurately reflects the phonetic sounds of the words. "Stomach" is spelled with the "ch" ending to represent the "k" sound in IPA phonetic transcription, while "steinway" is spelled with "ei" to indicate the "ai" sound in IPA. Together, these words create a unique phrase that can be used to describe a feeling of nervousness or anxiety in the stomach, often felt before a performance or important event.