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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
13 13
 
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
135 44
 
2.
a crowd cuaght in a confined space
toss a grenade into that cluster!
by Spaz De Kat January 14, 2009
57 27
 
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
43 28
 
4.
Disorganization; chaos; illogical.
Traffic was a cluster during rush hour.
by JMydlak August 09, 2004
28 23
 
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
19 18
 
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
14 23