A bowel movement so long, that it hits the bottom of the toilet, and topples over forward, hitting you in the balls.
I left a nice bellringer in the shitter for you to look at.
Someone who is proficient at ringing either his own bellend or more often somebody else's.
A gerneral term to describe someone you take a disliking to, can be used in place of bellend
Don't fart on me you bellringer
I punched that guy square in the nuts because he was a bellringer