Hejdå bro, see you later!
Det var kul idag, hejdå vi ses!
a phenomena when a swedish student is bored to death in school...
Hey look i'm bored and want to die, Hejdå!
It's the Swedish definition of "goodbye" "se you"
Jag måste tyvärr åka till affären nu... Hejdå allihopa!