Efrain Mercado Share definition Flag a small puerto rican kid that likes to smooch off of transexuals and hermafrodites and lost his virginity at age 3 usually found hanging upsidedown in foriegn rainforests. The Efrain Mercado is on the loo. Efrain Mercado by TiTANHDDDDD3 October 22, 2011 0 0 Get merch