Wiktionary
flob
n. (context UK slang English) spittle, especially a piece of spittle that has been spat out. vb. (context UK slang English) To spit or to gob.
Usage examples of "flob".
Byron threw himself sideways and the mop head flobbed onto the flagstones where his head had been.
He coughed up a massive grolly out of the back of his neck and flobbed it into the water.