A vegan café in Memphis has gone into hiding after getting into an online spat over a nude toddler.

The saga, dubbed #ButtholeGate by social media users, began when a customer left Imagine Vegan café a two-star review on Google.

"On the real, I eat here all the time," the customer wrote a week ago. "I still probably will [because] I like to go out and there are few options available to me BUT y'all listen.

"During my visit, a bare butt naked baby was running around, stood up on a table with its black they're so dirty feet, and bent over to show me it's butthole [sic].

"I wish I was exaggerating. This is like while I'm eating."

The upset customer also claimed another child was "yodelling and staring at me during my meal".