I have never heard "eating nails" used as an expression. Can you give us a full quotation? There is "spitting nails", angry, and they are iron nails.
New words, one handy idiom, and a 2-minute quiz — delivered to your inbox to keep your streak alive.
enoonHe was eating nails. Wrong.He was spitting nails. Right.He was mad enough to eat nails. Right.He was mad enough to spit nails. Wrong.That's interesting! Thanks!