I'm talking when dealing with people who are wasting my time and I cannot avoid them anyway because they are assholes intentionally or are unaware of other people.

I've learned from working with narcissistic people that it is best to call them out immediately on their bullshit and pressure flip calling them assholes (this triggers their response really fast), but that sometimes can be seen as losing frame by other people who think that's normal behavior or are their friends.

How do you deal with assholes who waste your time?