uy

"¡Uy, casi piso al gato!"

Whoa, I almost stepped on the cat!

"¡Uy! Se me cayó el vaso."

Oops! I dropped the glass.

"Uy, eso duele."

Ooh, that hurts.

"¿Cuánto cuesta? —Cien euros. —¡Uy!"

How much is it? —A hundred euros. —Yikes!