Artificial Intelligence (AI) has rapidly become a pivotal force in education, offering personalized learning pathways and dynamic solutions to longstanding instructional challenges. In English as a Foreign Language (EFL) contexts, idiomatic competence remains a challenging aspect of language development, often eluding effective coverage through conventional teaching methods. This article examines the integration of AI-driven tools, specifically ChatGPT, in enhancing idiomatic competence within EFL curricula. It contends that ChatGPT provides contextualized examples, real-time feedback, and interactive dialogues, bridging the gap between memorization and real-world application while fostering fluency, cultural awareness, and linguistic accuracy. The discussion situates these developments within the broader evolution of technology in language education, from Computer-Assisted Language Learning (CALL) to AI-supported methodologies. While highlighting ChatGPT's innovative and adaptive instructional potential, the article also addresses ethical concerns, privacy risks, and content reliability, underscoring the need for a balanced, strategic approach to AI integration. Finally, the article identifies key research directions aimed at optimizing AI's educational impact in EFL idiom instruction.