frame advantage is how many frames you have over your opponent. For example Raiden's 3,3,4 (i think) combo is -1 on block which means that Raiden recovers 1 frame slower than you do. (something like that although its kind of unclear to me too)

Fuzzy blocking is blocking an overhead or a low with the coresponding block before the animation takes place. Example is johnny cage's 2,1,f2 ends in an overhead. If I'm blocking low, I can fuzzy guard the overhead hit so it'll look like im still blocking low but i'll block the overhead due to the animation taking a little before activating

Some common fighting game terminology has been discussed/explained here:

Link to Thread

Hope this helps. If you have any questions about a term not mentioned in this thread, post back and someone here should be able to help.

Thanks you guys! let me read em now