From Japanese, 鉄板焼き (てっぱんやき, teppan'yaki), from Middle Chinese 鐵 (tʰet "iron") + 板 (pǽn "board", "plank") + Japanese やき (yaki "to fry").
teppanyaki (countable and uncountable, plural teppanyakis)
- A Japanese style of cooking in which thin slices of meat, or fish, seafood, vegetables and noodles are quickly fried on a hotplate
a Japanese style of cooking
In English (particularly American English), this mostly refers to cooking steak on a teppan (griddle), while in Japanese one instead mostly cooks お好み焼き (okonomiyaki) on such griddles.