You are batting 1%!

"You are batting 1%" is a baseball term, means hitting the ball very poorly, below average. The term is also used to mean you are performing extremely poorly in a situation where success is measured by a percentage, essentially indicating you are only achieving a very small fraction of desired results, similar to how in baseball, a "batting average" of 1% would be incredibly low and signify almost no hits at all. 

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Renege

To renege means to go back on a promise, undertaking, or contract. I learned this word in recent news on CNN that mentioned president Biden reneged on his promise and pardoned his son Hunter. Other synonyms include revoke, renounce, or abandon. 

Throwing a Fit

 I heard this term first when my son casually mentioned a couple of times "I had a fit" or "I threw a fit" when going over his day's events last night.  To "throw a fit" or "have a fit" means to become very shocked, angry, or worried. Other synonyms are: blow a fuse, blow one's stack, blow up, combust, go ballistic, lose one's temper.

Calling shotgun!

 Calling shotgun is an American idiom used to express your desire for the front row car seat, or claim it, when a group of people go out together. Especially if a family has more than one young kid, the siblings may compete to sit in front with the driver.  So, they usually run to car and say "I called the shotgun"! This saying has roots to Wild West era, 160 years ago, when the person next to the driver was protecting him:

https://www.businessinsider.com/wild-west-origin-shotgun-front-seat-car-2019-8