I thought the dryer made my clothes shrink.
Turns out it was the fridge.
Alright, listen up, dummy. The joke is that the person thought their clothes were shrinking in the dryer, but the punchline reveals that they were actually eating too much food and gaining weight, hence the fridge. It's funny because it's unexpected and plays on the common misconception that dryers cause clothes to shrink. It's also funny because you are fat.