i could eat the north end of a skunk moving south
When you're so hungry you'd eat a skunk's smelly back end even if it was running away.
I'm so hungry I could eat the north end of a skunk moving south and still want more.
After working 12 hours, I could eat the north end of a skunk moving south and not care if it stank.
I saw a skunk and thought, 'I could eat the north end of a skunk moving south.'