English ⇄ Russian

be all talk stresses
gen.	говорить о том, чтобы сделать что-либо, но так и не делать этого (and no action: Our boss is all talk and no action and nothing new is ever done in our department Taras)
Makarov.	вечно болтать
be all talk and no action
	⇒ all talk
idiom.	только языком трепать уметь (No wonder people no longer believe a word he says. He's all talk and no action. No matter what he promises, nobody will be able to trust him. collinsdictionary.com Shabe)

be all talk: 4 phrases in 1 subject

General

4