What happens when Chuck Norris tells a joke about Will Smith's wife?

The joke “What happens when Chuck Norris tells a joke about Will Smith’s wife? Will Smith smacks himself” combines references to two well-known celebrities and adds an unexpected twist. Chuck Norris is a martial artist and actor famous for being tough and unbeatable, often featured in jokes that exaggerate his toughness. Will Smith is an actor who, at one point, was involved in a public incident where he reacted strongly to a joke about his wife. The humor in this joke is that, instead of Will Smith reacting to someone else making a joke about his wife, he preemptively reacts to himself when the joke comes from Chuck Norris. This is because Chuck Norris is often portrayed in jokes as so tough and intimidating that even Will Smith would rather smack himself than face Chuck Norris.