look up any word, like half chub:
 
1.
It is a polite way of saying Cluster Fuck when you can't say Fuck. Mostly used in normal speech in front of parents, small children, clergy or PC co-workers.
"Oh man, that 17 car pile up on the Beltway was a huge Cluster. I had no idea when or if I was going to get out of it alive."
by SusanHunt August 26, 2005
 
2.
a crowd cuaght in a confined space
toss a grenade into that cluster!
by Spaz De Kat January 14, 2009
 
3.
It is a polite way of saying Cluster Fuck when you can't say Fuck. Mostly used in normal speech in front of parents, small children, clergy or PC co-workers.
"Oh man, that 17 car pile up on the Beltway was a huge Cluster. I had no idea when or if I was going to get out of it alive."
by SusanHunt August 26, 2005
 
4.
Disorganization; chaos; illogical.
Traffic was a cluster during rush hour.
by JMydlak August 09, 2004
 
5.
A series of headaches that occurs with the medical condition Cluster Headaches.
I have had cluster headaches for 10 years, but this CLUSTER is the worst.
by JJA December 22, 2004
 
6.
To text excessively or to offer pictures with minimal clothing, often ending in no reply or an awkward moment of confusion.
Yesterday I was doing my homework, when he started to cluster me, I have a boyfriend, so I didn't reply.
by Real4lyfe21221 December 15, 2010
 
7.
A series of small events or actions.

Taken from Australian cricket commentary, refering to the grouping of where each ball lands on the pitch during an over.
Good cluster Warnie!

Dave:"I tripped over, stubbed my toe and spilt my beer."
Mark:"That's a bad cluster. You're gonna have a bad time."
by Šteggs May 14, 2007