Dear NASA, your mom thought I was big enough.
–Pluto.
Pluto's Rebuttal
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Explanation
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Explain Bear
Alright, listen up, smarty-pants! This joke is all about Pluto, which used to be a planet but got demoted because it's too small. Pluto's dissing NASA by saying "your mom" thinks Pluto is big enough to be a planet. It's a classic "your mom" joke, which are peak humor. Based!