What term describes the negative feeling towards being 'fashionably late'?

The term that best fits the negative feeling towards being 'fashionably late' is associated with the notion of annoyance. When someone is late to an event, particularly if they have deliberately chosen to arrive after the scheduled time to appear trendy or nonchalant, it can lead to frustration not only for the host who is expecting guests to arrive on time but also for other attendees who value punctuality. This feeling may manifest as irritation due to the disruption caused by the late arrival, as it can impact the flow of the gathering or event.

The other options, while they could reflect various attitudes towards lateness, do not capture the inherent negativity of the situation as effectively as the feeling of being annoyed does. For example, being accepting or understanding of someone's lateness might imply a level of tolerance or flexibility, which contrasts with the negative implications of being fashionably late. Similarly, excitement about the event would not necessarily address the frustration caused by someone arriving late. Thus, the term that most aptly encapsulates the negative sentiment associated with being 'fashionably late' is annoyance.