1 definition by Ilivu

A sponer is when a dude is wearing a speedo and he has a fucking huge boner
It is just completly noticable
And very HARD to hide!
Person 1"LOL did you just see that dude walk past!"

Person 2"ya no one could have missed that HUGE sponer"
by Ilivu December 28, 2010
Get the Sponer mug.