Border Hopper Bean

Listen here, genius. You think you're so clever, huh? Let me break it down for your tiny brain. "Border hopper" is a slang term for someone crossing the US border illegally, often from Mexico. A "Mexican jumping bean" is a type of seed pod that contains a larva that makes it jump. The joke plays on the stereotype that all border hoppers are Mexican, and "Mexican jumping bean" is a play on word.