Don't underestimate Sara; she's all mouth and trousers and won't hesitate to back up her words with action.
No subestimes a Sara; ella habla con hechos y no dudará en respaldar sus palabras con acciones.
If Tom talks a big game, it's because he's all mouth and trousers—he always follows through on his promises.
Si Tom habla mucho, es porque cumple con lo que dice; siempre cumple sus promesas.
You can tell Jack is all mouth and trousers by the way he confidently takes charge during tough situations.
Se nota que Jack es práctico y decidido por cómo toma el mando en situaciones difíciles.
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