No means no — even for Grandma.

An Australian program is trying to educate young children on sexual consent by explaining they have the right to even tell Granny to hold back on her kisses.

But the push is taking heat — from the older generation.

The Respectful Relationships program being taught in Victoria schools is meant to help kids learn to say no to unwanted physical contact. But in one “child-friendly” example, educator Margie Buttriss ignited a firestorm when she told kids they have the right to turn down sloppy kisses from their grandmas.

“We’re talking about situations such as Grandma wants to swoop in for the big sloppy kiss, and if the child doesn’t want that to happen, what can they do,” she said, according to the Australian Broadcasting Corporation.

“And they can respectfully say, ‘No thanks, Grandma, let’s have a hug instead.’ Or if it’s someone they don’t know, ‘Let’s high-five, let’s fist-bump.’ ”

That didn’t sit well with oldsters, who quickly politicized the program as they raged about it online.

“’No thanks Grandma’: Children taught to say no to sloppy kisses to understand consent. This rot bought about by some extreme lefty who never had a granny,” wrote Twitter user Dennis Barr, who identifies himself as a 69-year-old with “greatgranddaughter Aussies.”

“Yet they support Sleepy Joe and his constant touching. Even kisses his granddaughters on the lips! I’m INSULTED!” fumed Twitter user American Grandma, referring to presidential hopeful Joe Biden as she shared a copy of the story.

“So a kiss from granny is now abuse?” raged Twitter user @1Swinging_Voter.