Black holes are regions of spacetime where gravity is so strong, it warps the fabric of space around them. Or, you know, just a fancy way of saying they're really bad at parties.
But don't worry, they're not all bad. Some black holes are actually really good at hosting ragers. Like, have you seen their event horizon? It's like a cosmic velvet rope, keeping all the cool kids in, and the not-so-cool kids out.