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-eco Suffix indicating deformity and perversion.
From Nahuatl -ic 'id.' Highly endemic to Central America dialects located in Nahuatl's historic linguistic territory. Not related to the diminutive suffix -eco, which is from Latin -icus.
Karttunen, F. E. An Analytical Dictionary of Nahuatl. University of Oklahoma Press. 1983.
Wagner, M. L. "El sufijo hispanoamericano '-eco' para denotar defectos físicos y morales". Nueva Revista de Filología Hispánica. Año 4, No. 2. 1950.