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1.
somone who has a huge cock and gets all the girls
he is such a gillespie
by qwertyuio June 11, 2008
 
2.
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.
by Ms Katisha July 22, 2010
 
3.
hipster
shes such a Gillespie
by ticklemesam November 13, 2011
 
4.
A pie made of someone named Gilles. Like in Sweeney Todd.
Well, Gilles has been killed and baked into a pie. I guess he's a Gillespie now.
by sarah sponda January 29, 2011