Newcomer: need an acronym decoder

[i_hate_usernames_really_really]

As a newcomer to this place I keep running into acronyms I have no idea how to decode. Maybe there is one, but I haven’t found it. Here are a couple that after more research than I think should be necessary, I finally figured out, as examples:
BTB: Burn the Bitch/Bastard
RAAC: Revenge at Any Cost

 

[barefootgirl69]

It's going to be more fun watching you decipher them.