babooning
When you get a huge boner out of nowhere and it's so big, it looks like a baboon butt.
My friend got a B. A. B. O. O. N. so big, it looked like a baboon.
During class, I got a B. A. B. O. O. N. and I had to leave the room.
At the party, I got a B. A. B. O. O. N. and everyone was laughing at me.