cháau mihn
caau2 min6
炒 is stir-fried and 麵 is noodles (noodles made from wheat flour, not rice flour).
Chow mein is a general term for stir-fried noodles, including the steamed soft noodles familiar in Chinese-American cuisine and the Hong Kong-style crispy noodles.
Despite the American spelling mein pronounced like Main Street, spelling it as mien as in mean streets would be closer to the Cantonese pronunciation.