meltrix Share definition Flag An old woman with a such an old gooey vagina that it's like getting your dick trapped in the matrix, but melted. "What would you do if you had sex with a girl with a meltrix? I'd ask Morpheus for the red pill." meltrix by SAMeleon January 22, 2009 0 0 Get merch Get the meltrix mug. Buy Now — $32.95 See more merch