Related terms: motherfornicator, rat fornication, fornicate the canine, clusterplook, clusterboink, clusterscrew, clusterfreak, clusterfunk, clusterfrig, clusterfrick, clusterfug, clusterfrell, clusterfudge.
Real citation: "Big clusterfornicate. Match was there. ** ½."
(Dave "Boffo" Hines," Bo and Bob's Wrestling Extravaganza, http://bobobwrestling.com/recaps/jakked/jakked.htm)
Made-up citation: "Kate and her mate hate a clusterfornicate, but Mike and his bike like liquefied chicken manure very much."