Definition & Meaning of "I will yeah"in English

What does "I will yeah" mean in Irish slang?

In Irish slang, "I will yeah" is used sarcastically to mean the opposite of its literal wording, effectively meaning "I will not" or "not likely." It became common in modern Irish conversational English as part of ironic or humorous speech patterns, especially in casual disagreement. It is typically used in response to a request or suggestion where the speaker is clearly refusing but does so in a playful or dismissive way. The phrase is not a fixed grammatical structure but an ironic inversion of standard agreement, relying on tone to signal the contradiction.