Misinterpretation

I was in a pub last Saturday night, drank quite a few, and noticed two very large women by the bar.  They both had pretty strong accents, so I asked, "Hey, are you two ladies from Ireland ?"

One of them snapped back saying, "It's WALES , you friggin' idiot!"

So, I immediately apologized and said, "I'm sorry. Are you two whales from Ireland ?"
That's pretty much the last thing I remember...