Hi, Rusty!
I think I like your earlier explanation of a "gorilla" best....as in bigger than a "monkey"......£1000 being bigger than £500.
I cannot find anything else yet.
"Thunderplump" is new to me, too!
That isn't in my Chambers or my COD, but I did find in an online Oxford dictionary, telling me it is a Scottish word.
I am increasing my vocabulary this evening!
Yes, I enjoyed my tennis! the Bahrami match put me in the mood for what followed!
I hope tomorrow's matches go well.
I must get up promptly (!) tomorrow and take the dog out by 8am.
Today 's oversleep quite threw me out!!
P. S Yes, but why did Chris Froome punch a spectator? One can't just go around punching folk!
.......and what of Heather Watson's £9,000+ fine for racquet abuse?!