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пустой разговор stresses
gen.	vapid conversation; insignificant talk; small talk; tea-table conversation; tea-table talk; idle talk; breezy conversation (Alexey Lebedev); moot question (American m_rakova); blather; blether; blither; talk; tattle
arch., Makarov.	jowl
austral., slang	guff
fig.	vanilla
inf.	empty talk (Andrey Truhachev)
Makarov.	milk-and-water
slang	blub; bull; drip; hot air; junk; yuk-yuk; nonversation (http://www.urbandictionary.com/define.php?term=nonversation ladyhayes)
slang, explan.	gas
пустые разговоры
gen.	popcorn; idle reports; lip service (контекстуально 'More); cheap talk (Ivan Pisarev); all talk (Taras); patter; dalliance
bank.	game of semantics (akimboesenko)
fig.	vanilla
idiom.	all show and no go (cnlweb); all bluff and bluster (cnlweb); all hat and no cattle (cnlweb)
inf.	spiel (Andrey Truhachev); bloviation (Andrey Truhachev); hot air (Andrey Truhachev)
Makarov.	empty talk
slang	chin fest; poopycock (Mari-ria)

пустой разговор: 12 phrases in 4 subjects

General	7
Makarov	1
Slang	3
Vulgar	1