The fear of things that are in clusters. For example: holes or dots in clusters, certain insects gathered or on top of each other in a group, groupings of things
1. An acute fear that certain types of social or performance situations will definately go bad leading to avoidance behavior.
2. Irrational anxiety elicited by even the thought of exposure to an insuing cluster-fuck.
My sister is so clusterphobic, every time she is asked to help plan an event or holiday party she will throw a shoe just trying to run away.
Wes experienced severe clusterphobia whenever his work group called a meeting because every plan they came up with always turned into a patheticcluster-fuck.
The point and time when a situation becomes "Too Much". The breaking point where you feel like you must get out now, or you might start to panic. Similar to claustraphobia, however it usually involves a Cluster-Fuck situation.