Translation taken from here.
Credit goes to Ogawaa.

Aren't those things poisonous?

Gigginox is poisonous; Khezu's just foul.

No way in hell am I eating a Khezu.

ialdabaoth said:

No way in hell am I eating a Khezu.

They're surprisingly good eating. Fatty, like salmon or tuna belly.

CrazyYanmega said:

They're surprisingly good eating. Fatty, like salmon or tuna belly.

Wasn't there's in-game line descripting Khezu meat as 'looks appetizing, but inedible'?

Rathurue said:

Wasn't there's in-game line descripting Khezu meat as 'looks appetizing, but inedible'?

That's the flank. The lips are tasty though.