Today's BWOTD is an old fave of mine:
"Oh he was giving me gyp about it all night" or
"My back is sill giving me gyp"
'Gyp' = an irritating pain
So this can be used to describe either an actual pain you are experiencing that is nagging, or a person who is being an irritating pain in the butt!
I still use this one alot and love it.