It means, "You're still my [female] friend."
Cochina means "sow". Cochina sucia would be "dirty sow".
Dirty girl
eres. 'you are' mala 'mean'
This phrase translates to "you are a slut like all the others". It is derogatory and offensive, using sexist language to insult someone.
It means Dirty Bay.
Tú eres = You are
what are you?
Tu eres cocina
Pretty you are. More normally it is "eres bella".
de donde eres = where are you from
In Spanish, "eres gay" means "you are gay."