keep your ear to the ground
keep an/(one's) ear to the ground
To listen for any indication of what is happening or will happen. A: "I'm not sure what's going to happen with this merger, so I'm keeping an ear to the ground." B: "Please let me know if you hear anything." I know Kim is keeping her ear to the ground in case word gets out about the promotion.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
keep your ear to the groundor
have your ear to the groundmainly BRITISH
If you keep your ear to the ground or have your ear to the ground, you make an effort to be aware of what is happening around you. Keep your ear to the ground. Know who is coming and who is going: a new vacancy could be an opportunity for you. Paul had his ear to the ground and always knew about future concerts before anyone else Note: In films, Native Americans used to be shown tracking people or animals by listening carefully to the ground for the sound of their footsteps.
Collins COBUILD Idioms Dictionary, 3rd ed. © HarperCollins Publishers 2012
keep/have an/your ear (close) to the ˈground(try to) be well-informed about what is or will be happening: Jane keeps her ear pretty close to the ground and can usually tell you what the mood of the staff is.
Farlex Partner Idioms Dictionary © Farlex 2017