When you don't hear correctly or you hear what you want to hear due to distraction or inability to actually stop and listen for once.
Ex. 1
Wife: "Pick up the kids at 4:30."
Husband: An hour late because he picked the kids up at 5:30. He had his man ears on.
Ex.2
"It's up in the cupboard!"
He looks and responds, "No, it's not in the fridge!"
He has his man ears on.