dnaonnaise Share definition Flag Portmanteau of DNA and mayonnaise. Origin unclear. Refers to male ejaculate; semen; jizz. "Stacey texted me last night. I think she wants my DNAonnaise." dnaonnaise by Justin Herbert February 20, 2015 0 0 Get merch Get the dnaonnaise mug. Buy Now — $32.95 See more merch