He whets his teeth on something.
More Hungarian Proverbs:
Hear and see much, say little.Hungarian
He washes his hand.
Hungarian
Don't leave the betrodden way for the untrodden one.
Hungarian
He does not put crosswise even one stalk of straw.
Hungarian
Even a heavy burden is light if lifted by many.
Hungarian
The gypsy is not accustomed to ploughing.
Hungarian