What does 'great hawking globs of spit' mean?
context:
(From 'Raising Steam' written by Terry Pratchett)
Moist sighed as he walked, dragging one leg pitifully, but not too pitifully, to the rear of the train. There he found a station guard berating a well-dressed man who had sat down firmly in the Third Class carriage among sleepy workers with greasy hands and bags of tools, and chimney sweeps with, of course, their sacks of soot, inevitably leaking. Moist was all for the common man, and most especially the common man who could have afforded at least one bar of soap over a lifetime, and possibly didn’t spit all the time, great hawking globs of spit, the ones with a personality of their own. And the toff, who reeked and dribbled best brandy, was holding up the train while the guard was dithering, derailed by a haughty voice.
Question:
Moist depised the well-dressed man (the toff) and pitied the common man (sleepy worker), right?
What was the well-dressed man's fault?
What does 'great hawking globs of spit' mean?