expression, ichidan verb
even experts make mistakes; even Homer nods
Proverb meaning that even a skilled person can slip up. Literally 'water leaks from the hand of an expert'.
プロの料理人でも、上手の手から水が漏れることがある。
Even a professional chef can make a mistake sometimes.
A traditional Japanese proverb. The exact origin is uncertain, but it uses the image of water leaking from a skilled person's hand to illustrate that even experts are not infallible.