After his promotion, John was _______ with excitement.

The idiom "over the moon" means to be extremely happy or excited. This idiom best fits the context of John being thrilled after his promotion. In hot water : This idiom means to be in trouble or facing difficulties, often as a result of one's own actions. It’s used when someone is in a problematic situation that requires resolution. Through thick and thin : This idiom means to support someone or something in good times and bad times, regardless of the difficulties. It conveys loyalty and steadfastness. Barking up the wrong tree : This idiom means to pursue a mistaken or misguided course of action or to make a false assumption about something. It’s used when someone is focusing their efforts or attention on the wrong issue.