What is the definition of Acids Bark?

"Acids bark" is a rather cheeky and whimsical term that plays on the idea of a tree's leaves or bark being acidic, like a sour grapefruit. It's like saying a tree's surface is a little bit of lemonade in the air, except way cooler and a tad more grimey.

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Here's an edgy example sentence: "The arborist declared the oak tree's 'acids bark' a 'ilent assassin,' and I guess it couldn't resist the call for a new 'acid-wash' spa treatment."