Metachild Share definition Flag Metachild- a boy that was sheltered too much by his mother taking away all sense of masculinity, and self-worth. Person 1: Why is that child such a wimp? Person 2: that's no child, that's a metachild Metachild by EpicLithos March 28, 2009 0 0 Get merch Get the Metachild mug. Buy Now — $32.95 See more merch