If you are off your oats, you don't have much of an appetite or energy to do much.

If you are off your oats, you don't have much of an appetite or energy to do much.

Trials and tribulations are events that cause suffering and pain.

If you get your oats, you have sex with someone.

If something or someone is in fine fettle, they are in very good condition or health

If you lose track of something, you no longer know what is happening to something.

If you pick up/take up the ball and run with it, you take over something started by someone else, especially when they were not able to complete it.

A whale is a serious gambler, a high roller.

In AmE to give someone the hairy eyeball is to look at them askance.

If you poke your nose in or into something, it means you are interfering or too interested in someone else's business.