"If I may be so bold" is a phrase that can be inserted into any everyday conversation to make yourself sound smarter/better. You don't even have to be saying something totally out there or "bold"...you can just say it.
I think this sandwich is great, if I may be so bold.
First off, this is used mostly by emo kids who use it for a picture caption on their myspace. People who say it don't realize how annoying it is. Also, asking "why so cereal?" deserves a punch. Just wait until another movie comes out then steal shit from there too!