water off a duck's back

Cultural  

1. To fail to catch on or make a mark: “The reporter's snide comments rolled off the candidate like water off a duck's back.”

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Example Sentences

"The nature of the insult was water off a duck's back," she writes.

From BBC

“Water off a duck’s back,” wide receivers coach Sanjay Lal said during the spring.

From Los Angeles Times

"Ali spent all the time with her hitting straight, holding her balance. He wasn't happy that all the work he was doing was being undone because when she got it wrong she was lauded as a hero for inventing a new shot. For Nat, it was water off a duck's back."

From BBC

Now in its 19th series, criticism of The Apprentice falls "like water off a duck's back" these days, he said.

From BBC

"It's like water off a duck's back really, the way he just sort of takes it all in his stride," sports psychologist and former women's world number one darts player Dr Linda Duffy told BBC Sport.

From BBC