back and forth

Or text memes back and forth.

And recent research suggests some mayfly populations may even switch back and forth between these two forms of reproduction.

I listen to audiobooks on my way back and forth to work.

It’s a way for bits of code to pass data and instructions back and forth between services safely without having to deal with all the complicated visual stuff that humans need.

Nowadays, you'd have some fancy underground conveyor belt or you'd just have trucks loading up and driving back and forth.

If you're in an area with, like, kind of crappy cellular signal and your phone is, like, hunting and switching back and forth between 4G and 5G, that can drain your battery a lot.