FLOB
Etymology 1
Uncertain; possibly imitative.
Noun
flob (uncountable)
(UK, slang) Spittle or phlegm, especially a piece of spittle or phlegm that has been spat out.
Verb
flob (third-person singular simple present flobs, present participle flobbing, simple past and past participle flobbed)
(UK, slang) To spit or to gob.
Etymology 2
Probably an alteration of flop.
Verb
flob (third-person singular simple present flobs, present participle flobbing, simple past and past participle flobbed)
To flop; to move or behave in a loose or uncoordinated way.
Source: Wiktionary