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Tricking an otherwise unobtainable girl into bed through the use of excessive alcohol.
Alec: I thought Katie didn't like him though?

Alex: He must have Gillarded her
by althekid1891 November 21, 2011
An expression used to describe someone fucking you over as they break a promise they had made earlier. Happens commonly with Australian politicians.
Rob: I'm really looking forward to starting UNI next year now that my gap years done!
Ben: Burn! I just saw the news, they've changed the rules; you wont get funding now 'cause ur a country bumpkin. You just got Gillarded!
Rob: WTF!
by I_H8_alp November 18, 2009