to  be  all talk (and no action / )
be
bi
bi
all
ɔ:l
awl
talk
tɔ:k
tawk
(and
ænd
ānd
no
nəʊ
new
action / )
ækʃən
ākshēn

Definition & Meaning of "be all talk (and no action)"in English

to be all talk (and no action)
01

used to describe someone who continuously talks about what they are planning to do, but they never do or achieve much 

to [be] all talk (and no action|) definition and meaning
Disapproving
Idiom

What is the origin of the idiom "be all talk" and when to use it?

The idiom "be all talk" originated from the concept of someone who talks or boasts about doing something but fails to follow through with action. It is used to describe individuals who lack action or substance behind their words, often indicating a tendency to exaggerate or engage in empty talk.

Examples
He's all talk and never delivers on his promises. 
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