A crazy alter ego; good for blaming when acting in a particular weird matter that no sane person would act like
Ex 1:Matt:"Wow did you see Brooke last night? She was acting so crazy"
Carly:"no, that wasn't Brooke, that was senior boogie"
Ex2: No i didn't get drunk and then went streaking after making out with my best friend's boyfriend/girlfriend, but senior boogie did, senior boogie also "accidentally" peed on you when you were passed out