A stupid butthole. She will leave her boyfriend at the drop of a hat for someone she thinks is hotter. Pretends she cares about others feelings but doesn't. Rude.
Wow, she's being such a Gillian right now.
by buttmaster696969696969 February 11, 2014

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A self-centered, vain, bossy, annoying bitch who has teeth in her vagina.
Dude she is such a Gillian.
by littlered234 August 11, 2011

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A sexual practice in which a woman demonstrates anal oral sex unto a man while he is urinating.
You fat wizzard you, i heard you got gillian from susan!

Yeah jealous?
by Rimmy rims September 25, 2010

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a girl who likes to unicycle and joined the wrestling team ands she got POUNDED ..but she survived, and we all loive her greatly
Gillian failed religion.
by ewelina September 29, 2005

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a gossiping valley girl; pathetic in every way; with the suffix spiers, a lesbian; in referance to boys, a flamboyant and obsessive video-game player
You're such a gillian!
by Ron Deward January 03, 2008

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the incorrect way of spelling "Jillian".
my sister's name is Jillian, if you spell it Gillian she will cut you.
by juliaonthemoon February 02, 2009

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The Urban Dictionary T-Shirt

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The Urban Dictionary T-Shirt

Smooth, soft, slim fit American Apparel shirt. Custom printed. 100% fine jersey cotton, except for heather grey (90% cotton).

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