User blog comment:JonathanTennysion/Wanna know japaneese?/@comment-1274121-20110614045532

A few others:

Delicious: Oishii!

So-so: Maamaa.

Gross: Mazui!

Cheers!: Kampai!

Thank you for the meal: Gochisousama!

Probably the most important one is "Itadakimasu!" (the u is silent) which is what you say before you start eating. It doesn't translate well; it's literally something like "I am about to receive (this food)" but sometimes people translate it as "let's eat" or saying grace, even though those are technically wrong.

(also, I agree, no=iie)