look up any word, like donkey punch:
 
2.
A building which does not contain horses.
The stable was unstable. The unstable was stable.
by flob October 14, 2007
 
3.
a word that describes a horrorcore/acid rap/wicked shit/hip hop/ RAP GROUP based out of Virginia
I found music @ www.unstableonline.com for unstable.
by Unstable terret April 21, 2011
 
4.
someone who is unpredictable but yet irresponsible
No one should with someone who is unstable because they can cause problems for you in the long run.
by Gerard Irick November 01, 2010
 
5.
Substitute for any word, meaning like mentally unhinged, or mad or awesome......
Dude..thats unstable!...
or man that songs unstable i luv it!
by unstable child October 30, 2005
 
6.
Being pathetic, disgusting, and not able to support oneself.

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"You are so urbandictionary"
by Urban dictionary.com hater September 12, 2003