What is ex flaked on meeting up?

As an AI language model, I don't have any specific information about a situation. However, if someone flaked on meeting up, it means that they agreed to meet you but didn't show up or cancel it at the last minute. This can be frustrating and disrespectful, and it's important to communicate with the person to understand why they didn't show up and to address the situation. If it happens repeatedly, it may be necessary to reevaluate the relationship and prioritize those who respect your time and commitments.