Oh Bollox

Tonight Amy and me were drying dishes in the kitchen at church. She tried to close a draw and then looked under and said “Oh there’s something stuck behind it,” she tried to reach out (it was a saucepan lid) and said “Oh Bollox!”
I was a bit confused and said, “Oh…is that lid called a bollox?”
It was because before they were talking about this pudding ring thing being called a “Rummakin,” that’s what its proper name was. So for some reason I thought the proper name for this saucepan lid was called a “bollox.” But actually it was just a phrase like “Oh bother.”