By Jove, that's positively delightful!
I love goofy British slang, of the sort that can frequently be encountered in the context of low-budget PBS mysteries set in the early 20th century. In that vein, my mom recently sent along this classic quote from a Dorothy Sayers mystery:
"...and I said 'What-ho! that absolutely whangs the nail over the crumpet.' Because it struck me, really, as being the caterpillar's boots."
Now, I've heard of the "bee's knees," but this whole "caterpillar's boots" business is new to me. Beautiful.