Jolly good! Definition 1 of 2Pro Tip 1/3Positive Emphasis Shows strong enthusiasm or agreement with someone's action or statement. You got the promotion? Jolly good! Pro Tip 2/3British Vibe Has a distinctively British flair; might sound quaint or old-fashioned to non-British listeners. A jolly good time at the Queen's tea party! Pro Tip 3/3Informal Cheer Best used in casual or informal situations rather than formal events. That was a jolly good match we played!