Military origin, but in general usage.

A total and complete failure due to someone's idiocy.

Also known as "Charlie Foxtrot".
Don't let Jon touch that computer, he's a walking Charlie Foxtrot.
by CF May 1, 2003
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Chaos. Anything that is occuring in a haphazardly. The situation is not even thinking about dreaming about having a sense of order. A clustering of items (usually people) in a fucked up way.
When people are trying to get off an airplane and retrieve their baggage from the overhead bins... that is a cluster fuck.
by alllwant April 22, 2005
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To drive on a busy freeway in close proximity to other cars, ignoring the multiple open lanes. Usually entails drivers clustering to the right side of the freeway while two or more left hand lanes are open, causing a dangerous and just stupid scenario at high speeds, greatly increasing the probability of an accident, which is usually caused by one person hitting their brakes, getting rear-ended, losing control of their car. This process repeats for the car that caused the rear-ending, as he/she is then rear-ended, and this goes into a domino effect of destruction, chaos, and sometimes death. Which in some circles, is recognized as Traffic Darwinism, as the less intelligent drivers are sometimes killed by their own stupidity.

Other definitions:

A dense orgy of more than three people where positioning movement is difficult. Often consists of double penetrations and more skin touching than air.
WTF is up with these people! Get out of the way! Look at all that freeway over there! Bunch of cluster fuckers!

I almost got hit by 3 cars on the freeway because all these idiots kept on cluster fucking the road!

Sally really knows how to cluster fuck! I didn't know there were that many places to put a penis!
by notstoppingtohelp February 24, 2010
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The fear of to many objects in a confined area.
My daughter hates going to my mothers cause nana is a hoarder. Her house is so cluttered, hence cluster phobia
by Plumbsavvy August 2, 2016
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A group of females usually seen flocking around college parties and / or bars. General attire can be any combination of revealing or skin tight fabrics, or be missing altogether. Average IQ of the group is likely below the standard. May seem to shamelessly fit cultural stereotypes. Possibly inviting, but may be vicious. Approach cautiously.
James: Did you see where Bob went?
Leonard: He got too close to the Slut Cluster. We have to get out while we still can!
James: We can still save him!
Leonard: He's dead, Jim!

Will: Let's go to that awesome bar.
Nathan: Word is, it's overrun by Slut Clusters. You can't get to the tap without getting sucked....in.
Will: Well count me in.
by Wiston November 3, 2013
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Whenever you are driving on a two lane highway and there are two eighteen wheeler trailer trucks blocking both lanes and driving ten miles below the speed limit which causes a significant amount of traffic.
I was making great time driving on Highway 70 on my way to Kansas City, but then there was a huge cluster truck.
by kevtronic January 4, 2012
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