Haeju - A city in North Korea that sounds like you're calling someon

A city in North Korea that sounds like you're calling someone a loser. People use it as a greeting, but it’s really just a way to insult each other.

My mom said 'Haeju' to my dad and he flipped the table.

I used 'Haeju' as my password and got banned from the game.

My friend said 'Haeju' to the principal and got detention.