don't buy green bananas en · X
Etymology
Refers to the time that it takes green bananas to ripen and become edible.
Meanings
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(humorous) One should not make long-term plans, as one may not live or survive long enough to accomplish them.
I don't buy green bananas anymore. I only buy one yellow banana, for I may not be around tomorrow.
2010, Norman Molesko, Retiring and Senior Living...Experiencing the Second Half of Life:"I'm so old, I don't buy green bananas!" "Don't say that, Granma! You're not so old..."
2010, Susan Lynn Meyer, Skating with the Statue of Liberty: