Engage in anal sex while watching sponge-bob theme song, then you parter releases feces on you penis while urinating making a spongy material, preceding to wash your partner with your 'sponge'.
I spongefucked my partner last night.
by Dick stapled February 03, 2011
Sponge fucking is where you get a lot of seamen and soak it up with a sponge, then squeeze it out inside a vagina as a way of artificial insemination
Yesterday, me and my wife Jenifer tried sponge fucking as an alternative to regular sex
by civeret August 17, 2010