Kutta kamina affu Sara din offline rahta ha kutta ma toh kahti hu ki phone ko agg lagade huh​

i had this before it is proper noun

it can be both; depending on the situation at hand.

explanation:

let's just say i get in to a confrontation with someone, and they say "ur mom", it could be seen as an insult. or depending on the relationship or comfortability with the person it may be seen as a joke. the distinct line is how the chemistry behind the confrontation.