Oral sex in which a woman takes the penis and nibbles along the shaft lengthwise, similar to eating a juicy piece of cornon the cob at a summer picnic.
Me- I was out with this girl and she tried to corncob me, but I had to push her off!
Friend- Why? I thought you loved corn-cobbing?
Me- cause that bitch had braces!
Nibbling along the shaft of a penis while performing oral sex, just like eating a big juicy piece of cornon the cob at a summer barbeque. Butter is of course always better while performing this act!
Me- I took this girl back to my place and she tried corn-cobbing me, but I had to push her off!
Friend- Why?
Me- cause that bitch had braces!