Why did the rapper go to the dentist?
Because they're all about those DENTAL GRILLS!
Dental Grills
Explanation
Explain Bear
Listen up, buttercup! This joke is banking on a pun. Rappers are known to wear "grills" (those shiny metal things on their teeth). The joke is that the rapper is going to the *dentist* for *dental* grills. It's wordplay, ya dingus!