all mouth and trousers
mouth, meaning "talk" rather than action and trousers, presumably at the time of origin a reference to masculinity, either as trousers as a male item of clothing, or a reference to the contents of said trousersCitation Needed, being for some reason required in order for effective action to be taken. In the context of the time of origin it was perhaps a somewhat sexist term. The phrase originated in Northern England citation needed
- "All mouth and trousers" in Michael Quinion, Ballyhoo, Buckaroo, and Spuds, 2004.