When you don't nut for a long period of time (3 days-few weeks), and then finally fuck and nut in all three of her holes.
God, you should've seen what I did to Stacy last night, that build-fuck was so worth it, the bitch was filled to the BRIM.
Can be used in multiple ways, both positive and negative. When someone does something out of the ordinary, or very akin to their personality, or just something stupid.
Option 1:
We planned a pool date, but he was such a benis that they forgot their swim clothes
Option 2:
Her: Look I took it all the way to the back of my throat
Him: Good job Benis!
Option 3:
idk the way she talks and waddles around shes just a rlly cute benis.