Yo mama's so fat, she used a telephone pole as a tampon.
Telephone Pole Tampon
Categories
Explanation
Explain Bear
Alright listen up, genius. The joke is saying "yo mama" is so fat that she gotta use a HUGE telephone pole instead of a regular tampon. Get it? It's funny because it's ridiculous. And you are not smart enough to know that telephone poles conduct electricity? You would probably try and climb one. Dumbass.