Shenani-twin 

Two female roomates that tend to get into any type of interesting comical or other wise hilariously entertaining mischief.

Best friends who get into whimsical shenanigans with each other.

Partners in crime.

Sisters, whether bio-logical or not

Two or more sets of shenani-twins

After a week of school Helen decided to redbox a movie and get chocolate wasted with her Shenani-twins.

Shenani-twin by Milton Bratley December 2, 2010

Shenanitwins 

Two people who enjoy causing shenanigans together. Do not have to be related, and are preferably both good at plotting and playing innocent.

Megan and Sean are the shenanitwins of my AP physics class.

Shenanitwins by shenanitwin 1 August 26, 2010