shamburger
n.— «Science has since turned the soybean into a nutritious food called textured soy protein. Versions of this product tastes like meat. On May 7, 1973, Sally Bennett introduced her version called the Shamburger.…“It never really took off in those days, but I sure tried.”» —May 7, 1973. (source: Double-Tongued Dictionary)
Further reading
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