Its not self-explanitory, it occurs when there is either an incest relationship because they did not spread apart the genes, therefor resulting in a shallow gene pool.

OR when a child is just plain out retarded..
Crackwhore: my uncle, dad, and brother all raped me, im also retarded so thats why im a retarded fuckchild.
by Fuckthepainaway April 9, 2005
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self explainitory
"Stop beating our retarded fuckchild"
by Yes Ma'am January 25, 2003
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