The dark side of one's personality, the part that screams and shouts inside you in protest at the
wrongness of society. Can be released through
song and dance of a particular type, as personified by 'Gillespians', the followers of the band 'Blue Gillespie' and the members of that same band.
I really let my Gillespie out last night.
I hope he didn't
kill anyone while I wasn't looking.
You can see
the Gillespie in his eyes when he sings.