TIFU I accidentally used a slur for an entire afternoon

So I'm a volunteer farmer and I was helping to build an irrigation system over a series of garden beds.

As I'm working, I see a faucet coming out of the ground, and as I work, I refer to it with the word my grandpa used to call it as I grew up.

A certain four letter slur for latino people that starts with s.

And NOBODY CORRECTS ME.

It isn't until the end of the afternoon when I'm talking to the head farmer that I use that term to refer to it, and he pauses.

farmer: "....what did you just say?"

me: "and then we just hook it up to the sp** right?"

farmer: "....you mean the spigot?"

me: "... spigot? my grandpa always called it sp**"

farmer: "well I think your grandpa might have been a little racist"

And then it all clicked. And now I want to bury myself alive.

As a bonus: When we were leaving, he was handing volunteers suckers. When he got to me, he looked at the bag and said, "oh, you probably don't want the brown one do you?"

....yeah I'm gonna go hide now.

TL;DR: accidentally called a spigot a slur for latino people to a group of volunteers.