Dabogda ti kurac otpo. = I wish your dick falls off
Jebo ti Bog mater. = that's one of the dirtiest used, some people get offended by it. it means litterally: God f...... your mother
Mamicu ti jebem. = F... your mommy. that's like saying "good day" here.
note: i don't take pride in my country's extensive and broad range of curses. i think we are ranked somewhere on third place as the country with most curse words.