cluster fuck (n.) Military term for a situation gone wrong due to multiple inept officers' involvement; cluster referring to the insignia worn by Majors and Lt. Colonels: oak leaf clusters.

Cluster fuck also refers to a drink that is made from numerous alcoholic beverages. The idea behind this is the word "cluster", which refers to the use of many alcoholic drinks. The idea of "fuck" in the name suggests that one may become very intoxicated after consuming this drink.

Cluster fuck is also used as slang when referring to multiple participants engaging in sexual conduct, more or less know as an orgy or group sex. An orgy is a group activity involving unrestrained indulgence. ... Peter Fendi, 1835 Group sex is sexual behaviour involving more than two participants at the same time. ...

Cluster fuck is also a reference to the situation when cars in a parking lot block each others movement in such a way that no one can make progress.

Cluster fuck can also refer to a situation in pool when many pool balls are grouped close together in a way where no pool shot is possible.

More generally, cluster fuck (abbrev. "CF") refers to any inelegant or untimely grouping of events, people or happenings, all converging in space and time, to create a situation where a person is stymied from doing what they had wanted to enjoy doing. For example, "the crowding of Prams at the Sydney Zoo creates such a cluster fuck that people cannot enjoy the animals". Cluster fuck is also a builder's term, implying a similar mess of events, happenings, or building disasters.

Cluster fuck is also intimately linked to "The Crowding Principle", which essentially states that just when you are about to do something where you don't want to be crowded or have your plans messed up, everyone one else will jump in right in front of you to create a "cluster fuck".