have half an ear on (something) - to listen to something without giving it all your attention.

I listened with half an ear as she explained what she'd been doing.

• get into a rut
• get into bed
• get into bed with
• get into bed with someone
• get into deep water
• get into gear
• get into hot water
• get into stride
• get into the act
• get into the spirit of
• get into the spirit of something
• get into the swing of it
• get into the swing of things
• get in touch
• get into your stride
• get itchy feet
• get it in the neck
• get it into head
• get it into your head
• get it off chest
• get it off your chest
• get it out of system
• get it out of your system
• get it together
• get just deserts