Yo mama so fat the last time I saw 90210 was when she stepped on the scale.
Lucky for me I'm only 210.
Yo Mama and 90210
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Explanation
Experiment
Explain Bear
Listen up, buttercup. This "yo mama" joke is all about making fun of someone's mom for being overweight. The joke says yo mama is so fat, that when she stepped on a scale, it read 90210. You see, 90210 is a famous TV show and a zip code known for rich people. This joke plays on the fact that scale's can't show addresses!