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In software development, carsonoma refers to a region of convoluted, dense, impossible to maintain, nonsensical code.

Like the carcinoma in medicine, a carsonoma has mutated from good code to become gross collection of malignancy that threatens the entire application. Like a cancerous tumor, this region often cannot be excised from the code without killing the patient. Synonyms: clusterfuck
Did you see the carsonoma in the discount offer page? There's no hope for fixing it.
by vinny the toadmaster March 01, 2011