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1.
A phrase meaning 'i dont know.' Usually used when some one asks you something you should know, or when your particularly clueless about any situation.
person 1- "Wow, how did you get that bruise?"
person 2- "Beats me!"
by Nemrem February 19, 2006
 
2.
When a certain person is exceedingly dumb. When they need some intellectual intelligence.
by MissNash123 January 17, 2011