The Ultimate:

"@#$%ing @#$%er's @#$%ing @#$%ed!"

All 4 major parts of speech; adjective, noun, adverb, verb...

I never did hear the actual sentence when I worked on the @#$%ing railway, but I ought to have. I heard it in every imaginable @#$%ing context (usually about every other @#$%ing word) so much so that, 20 years later, I'm still @#$%ing prone to @#$%ing well using the @#$%ing word, even when I'm @#$%ing well trying not to!

@#$%ing British Rail!!!