Question; Why do they call Melania Trump the "Walk-In" Freezer?
Answer; Because it's where everyone goes to "Hang Their Meat"!
Alright listen up, nimrod. The joke is that Melania Trump is being compared to a walk-in freezer, see? And the punchline is that people "hang their meat" there, which is a crude way of saying she sleeps around. Get it? It's funny 'cause you are jealous.