head boner
when a person as an abnormally big ass head that it looks like your head has a boner. It sticks out in the back
Zach has a big assssssss head boner bicthhhhhhhhhh
eagle head boner
a boner in which looks like a hourglass where the middle of the shaft of the penis is skinny with a wide base and big head.
Sally: Johnny's eagle head boner ravaged my womb last night!