bastard
/ˈbæstɚd/ /Brit ˈbɑːstəd/
noun
plural -tards
[count] informal
a offensive :a very bad or unpleasant man :a man who you strongly dislike or hate
b sometimes offensive :a man who you think is lucky, unlucky, etc.
c chiefly Brit sometimes offensive :something that is difficult or unpleasant
usually offensive :a person whose parents were not married to each other :an illegitimate child - sometimes used before another noun
This use of bastard was common in the past, but it is now usually avoided.
US