Shenanigans

Silly or goofy behavior done by a group of friends or closely associated people. Such silly or goofy behavior is almost always of a good nature, and involves good, sometimes clean fun. Said behavior will usually happen when all or most people in said group are either bored, hyper, or overly tired. It can also be identified as the actions done by said group that come about as a result of the friends in such group "getting high off of each other", a phrase used to describe the feeling of being high when around certain friends for a given amount of time, simply because they are awesome and fun to be around and they always have fun together and their company is very much enjoyed. Shenanigans is also, but less often, referred to as sneaky, deceptive, or mischievious behavior.