Rambunctious means "noisy and out of control," like a rambunctious child who is so hard to handle that no babysitter has ever come back a second time.
People who are rambunctious, pronounced "ram-BUNK-shus," can be fun — to a point. Laughing a little too loudly, or too often, seems refreshing at first — so what if people sitting at other tables have started to look over? But after a while, rambunctious behavior makes you feel tired. You never know when the high energy of the rambunctious is going to cross over to obnoxiousness, when things will spill, feelings get hurt, and apologizes need to be made.