What does PB mean?

[lapband 8-26-09 0]

I keep seeing posts where people say that they are experinceing PB. What does this mean?

[Erin18 143]

productive burp, it's not actual burping, you regurgitate what you ate that got stuck, and it's painful o.O

[elcee 3,341]

Glad you said its painful Erin because it sure is.It certainly isn't the simple process that I thought it was when it was first explained to me.It hurts like hell, takes a while and all the slime makes it really disgusting.