In Korean, “seum ni da” means, okay or I understand. When you say it quickly, it can sound like “sseumdwa”.
When Gary and Haha were paired up with Kim Jong Kook often in the earlier episodes, they used this phrase hoping it would catch on. They said it often because their bossy hyung was always barking orders.
Kim Jong Kook and the two kids was formed (and existed) in the earlier episodes, because they were always teamed up together. Kim Jong Kook would often discipline them whenever they caused the team to lose or did something wrong. When that happens, Haha and Gary would just bow their heads and listen to his nagging XD Honestly, I didn’t like how Jong Kook oppa treated them initially, but after a while, he toned down and I learnt that variety is just variety, so that was how I came to like the trio. In addition to all the naggings, they also provided us with various hilarious moments, not to mention that the kids were pretty cute at that time with their actions and interactions. (I guess they became more mature as they became older and after KJK and the two kids slowly ended.) Nonetheless, I would love to see the grouping again, maybe without the father-kids kind of relationship but more of just funny interations that only they can present.
Favourite Moment: Ep 23! Jong Kook chided Haha and Gary after they bickered over Ji Hyo while they lie on the snow, telling them how family was more important XD. That was a cute scene and probably the only scene that I liked about that episode :P (I posted a Running Moment post on this scene, look the ‘ep 23’ tag on the main page of this blog under the ‘episodes’ tag.)
P.S. On a side note, ep 23 was kinda disappointing, those who have not watched it, I would suggest you skip to the last mission. Even though I did finish that episode, I wasn’t paying attention most of the time. ㄱㄱ:P