be all mouth

(redirected from be all mouth and trousers)

be all mouth

To be full of boastful, arrogant, or shallow talk without the ability to deliver on such claims He talks a big game, but when it actually comes to asking out a woman, he's all mouth.
See also: all, mouth

be all mouth

  (British, American & Australian informal) also be all mouth and (no) trousers (British informal)
if someone is all mouth, they talk a lot about doing something but they never do it She says she'll complain to the manager but I think she's all mouth. You're all mouth and no trousers. Why don't you just go over there and ask her out?
See also: all, mouth