[DennisP]

What I'm talking about is an electric grinder that that sink drains into. Lots of people have them in the US.

[Terr_]

I've always enjoyed the pun in the branding of "The InSinkErator."

[Tagbert]

Ah, we mostly call that a garbage disposal. They are very common.

[nsvd]

Yes, the grandparent comment you're replying to also called them garbage disposal.