to stroke or caress someone in a suggestive or arousing manner, except both parties know that it isn't going any farther, differentiating it from a tease.
jimbob: damn you two were all over eachother tonight

fredrickson: yeah man no worries we were just gillying
by rainyface July 26, 2009
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person that doesnt stop laughing
Stop being a gilly.
by soccerstud9008 February 16, 2003
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A person who sexually abuses disabled elderly men.
Grandpa's in the hospital, he got humped by a Gillies last week.
by LIgen October 11, 2012
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1) Sister Cabin of Binnacle
2) Your Mom in Labor
Oh, Gillies and Binnacle, they came from the same mom in labor
by supremecourtier March 9, 2005
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Homecoming king who gets concussed and doesn't come to school for 4 weeks (perhaps more), older women love him
Is that 18 year old dating a 42 year old woman?
Yeah, he's such a Gillis.
by mnhockeyfan October 16, 2019
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someone that is very pretty but makes sure to deny it when someone tells that person that they are pretty.
him: your pretty
her: oh no I'm not...
him: your such a gillie..
by sarah loser June 25, 2005
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