Onamonapenis Share definition Flag The sound your penis makes when you ejaculate. The sound you hear is the whispers of your future. Jack and Jill were having ses and Jill heard Jack's onamonapenis whisper to her that she is now el pregante. Congragles! Onamonapenis by Uh... Skinny Penis December 15, 2017 0 0 Get merch Get the Onamonapenis mug. Buy Now — $32.95 See more merch