Yo mama is so smelly that whenever she steps outside, she pollutes the air!
Yo Mama Smelly
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Explanation
Experiment
Explain Bear
Okay, listen up, buttercup. This "yo mama" joke is all about exaggerating how stinky someone's mama is. It's saying she's so smelly that just her walking around makes the air dirty. You probably don't shower enough, so you probably stink too.