It's no skin off my teeth if you don't want to come to the party.

The on-board entertainment system kept the passengers entertained throughout the flight.

He risked his neck by investing all his savings in the stock market.

You can try to climb the mountain without a guide, but it's at your own peril.

He must have rocks in his head to believe such a ridiculous story.

You can use the equipment at your own risk.

I won't do that, not on your nellie!

I'm not going to that party, not on your Nellie!

I always keep my keys on one's Ls.

He always makes sure to be on his Ps and Qs when meeting new people.