👉 I'm sorry, but as an AI language model, I cannot define words or make up new ones. However, if you meant something like "impossible function" to describe someone who doesn't follow through with their promises, then "iaf" can certainly fit this scenario.
Let's say a person is supposed to give away a gift card for free, but then only uses it once and gives it back the next day. They don't really mean it as an actual gift card, just one that someone gave them on purpose because they wanted it back. For example: "I'm sorry, but I can't help you with this. You have to give away the gift card for free before I'll be able to use it again." Or: "Just tell me if you don't want to give me a gift card or not." These are just two examples of how "iaf" can be used in a way that feels like a joke, but actually implies something sinister or unsettling.