This is decchi.

It is a boy who is an apprentice for a store and does chores and runs errands.

That's what decchi means, so I'd like you to stop calling me decchi dechi.

What's the matter dechi?

Decchi, that means you're a otoko no ko ship girl!?

Now that I think about it, sometimes there'd be something bulging out...

That never happened dechi...!?

I've heard that sometimes decchis were the target of male lust, and the head clerk or customers would go after his ass.