all mouth (and no trousers)
all mouth and no (action|substance)all mouth (and no trousers)
01
used to describe someone who never puts their word into action
Idiom
Informal
Exempel
In the end they seem to have been all mouth and no trousers.
Very few carry out these threats and those that do not, lose some credibility with their children who see them as all mouth and no action.
