I don't know all the words but it can be:
1)anywho = quien sea (i'm not 100% sure)
anyhow/anyway (they can be equivalents in spanish) = como sea, de cualquier manera, de todos modos
3)wtf? = que rayos ...?, que demonios ..?, que mierda ...? (also in chile -my county- you can say: que wea..? )
6)brb = esperame, ya regreso, ya vuelvo.
10) shut up= callate!!
another:
lol = xD