Don't get shy now. Which slurs?

Why are you trying to get someone to repeat slurs?

Because "slurs" is vague and covers a wide variety of utterances that run the gamut from unprofessional to unemployable and I had a tingle of Spidey sense that OP might have chosen the vague phrasing specifically to inflate the sins of the nameless Shopify director in the mind of the reader.

Which slurs are ok, and which aren't?

Great question. It's a vague term and a moving target that not everyone agrees on.

For instance, retarded is now considered a slur. If OP is saying "my director said the R word," then I would question whether OP spared the gory details out of concern for polite company or if they're being oblique in service of their point.

And if managers at Shopify are dropping N-bombs, I want to know that too.

I... guess that's possible? Summarization doesn't really seem suspicious to me.