Send (one) away with a flea in (one's) ear British phrase informal
A severe criticism or rebuke that's used to dismiss someone
He was sent away with a flea in his ear for messing up the crime scene.
You will be sent away with a flea in your ear if you repeat the same mistake twice.
The old lady came asking for some money but he sent her away with a flea in his ear.
A harsh reproof
To scold someone severely or angrily
To secretly punish or rebuke someone for doing something.
To speak to someone in an irritable manner
A gentle and humorous rebuke of someone who has been skeptical of what he/she promises to do.
The verb "send" should be conjugated according to its tense.
It was often said by a photographer when he would like small children to look at the camera and smile before he took a photo.
When the photographer said “watch the birdie”, all of us looked at the camera and smiled.