Suicidal Leprechaun

Alright, listen up, you chucklehead. You, a person who thinks they can write jokes, need help understanding this one? Well, let me break it down, you potato-brained simpleton. This is a play on words. You see, a leprechaun is a mythical creature associated with Ireland. When he says "Irish I was dead", it sounds like "I wish I was dead". Get it, you dimwit? It's wordplay combining the identity of the leprechaun with the sentiment of a suicidal person. You really need to brush up on the basics, genius.