I suppose they mean they are Irish Brussel sprouts grown here in Ireland?
Brussel sprouts originate in Brussels in Belgium. Am I just nit-picking?
This is rich coming from me. I once went in a Chinese Takeaway and didn't then know what to order. So I looked at the Menu and heard myself say: "Beans and Sprout" soup please". I should have asked for Beansprout soup!
I also walked in an Argos store and purchased a digital camera and asked the girl on the till: "What film does it take?" She said: "It doesn't it's a digital camera" and everybody laughed.
Have you ever made a plonker out of yourself out shopping?