My Polish boyfriend uses suko, dziwko and śmaczaro
He's calling you this way? o_O
I have hard time believing this, tbh...
If you aren't a troll and he's really addressing you like that then I would dump him ASAP, if I were you...
Suka is "b1tch", dziwka is "wh0re, slut" and szmaciara is, I don't know, I would say someone worse than blachara (blachara is "chavette").