ive had my band for almost 3 months and i am going in for my 3rd fill i keep reading about slime and pbing on here but i have no clue what it is

Oh I am sure you will. After three fills, that's when the pb and the slime started for me. That is only if I don't chew something until it's liquid. The slime is what your body produces when it's trying to get something through your band. You know how your mouth waters when you are about to puke? Pb stands for productive burp but it's just a polite way of saying throwing up. Sometimes, it's like a burp and food will come with it. Sometimes, it's more like regular puking.

it's gross, I started with my second fill on friday....

so I'm having to chew extra extra.

Slime is what the esophagus produces to lubricate food to pass through. If something gets stuck, then there is an overproduction of this fluid----it's a mess to deal with, thick and..slimy. PB--like others have stated, is bringing up the food that won't go through the stoma. Good Luck on your 3rd fill!