Cord bro Share definition Flag When they take stem cells from from your brothers umbilical cord and inject them into another embryo as part of an invitro fertilization process. Not so experimental anymore. Yo man. Is Kevin Costner really you're cord bro? Cord bro by Mr. Chips May 12, 2006 0 0 Get merch Get the Cord bro mug. Buy Now — $32.95 See more merch