You can find it at the top of the page near the life preserver. Besides reading the list of acronyms (actually two lists...they are split up, a-m and n-z.) you should read the entire self help center, as there is a lot of good info for newbies. It is also a good idea to read back on this board as many of the same questions come up over and over.

Another good source for the acronyms and definitions is urbandictionary.

It can be found in the self help center. Link included