back and forth
- moving in one direction first and then in the opposite one;
- She skates with a back and forth motion.
betwixt and between
- between two choices or ideas or unwilling or unable to decide between them;
- Brian couldn't decide whether to play or study; he was betwixt and between.
down - and - out or down and out (adj.; n.)
- having no money, no luck and no opportunities;
- Nobody loves you when you're down and out.
by and by
- after a short period;
- By and by Sarah appeared.(turn a place) inside out
- to search a place very thoroughly;
- Andrew turned this place inside out looking for his keys.
on and off (also off and on)
- The light kept flashing on and off all night long.
to and fro
- back and forth;
- The dog ran to and fro across the lawn.
- I dropped my keys in the sand round about here somewhere, but I don't know exactly where.
over and out
- said when you are talking to someone by radio in order to end the conversation;
- The air controller signalled the end of his conversation with 'over and out'.
- without stopping; continuously;
- That song plays on and on. I wish they changed it.
Can you think of any other example?