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1.
slang. a simple term which is a target of at least 2 or more people which is basically telling them to fuck off.
gangstaz:yo foo come get u some give me yo chedda
innocent pedestrian: FUCK YALL!!!!
by nfiver August 29, 2003
 
3.
A word that hillbillies/rednecks use because they cannot pronounce the words "fuck" and "you" properly, so it comes out "fuck ya'll." I believe it stands for fuck you all if you take out the contraction, but then that just makes it sound even more retarded, so I will just say it's "Fuck ya'll." It's commonly used in the phrase, "Fuck all a ya'll!" which translated into proper english means "fuck all of you all." I'm not even going to go there, so have a nice day =]
Redneck: Hey ya'll
Group of people: Go away you fucking redneck!
Redneck: FUCK YA'LL
by Querty February 26, 2007