Everybody is very busy taking walks
And, OF COURSE, they are also busy procrastinating.
It just happens to be a lot shorter to say than "I don't want to talk to you, complete stranger. Leave me alone."
"go away! I got soaked last night and my head feels like the woodcutter split it with an axe. Talk to me again an I'll split yours!" says the filler npc as she shambles around my village aimlessly.
"I'm busy. So very busy. Busy, busy, busy".
"I'm busy loitering".
"I'm busy showing off my new hat in town".
"I'm busy, but you're too self-centered to notice".
"I'm busy, you're busy, lets not waste each other's time".
Separate names with a comma.