hydroerection Share definition Flag When a penis fills with water instead of blood and becomes wavy. Woahhhh, tuuuubuularrrr my sperm is surfin MALIBU on my dick!!! RAWESEOOMMEMEMEM!!! Hydroerection hydroerection by Hydrocock September 18, 2008 0 0 Get merch Get the hydroerection mug. Buy Now — $32.95 See more merch