Wonder weasel Share definition Flag A slang term for the genitalia of males and some females. "It's not a rocketship it's a cock!a shlong! wonder weasel!" -Robin Williams in Death to Smoochie. Wonder weasel by Chrissie April 28, 2003 0 0 Get merch Get the Wonder weasel mug. Buy Now — $32.95 See more merch