Like the term 'killing it' but ten times worse.

To achieve this requires failing in the worst way possible.
- So did you chat that girl up?
- Yeah I asked her if she was into tentacle rape porn
- Dude, you totally gilled it.
- Yeah I'm gilling it
by AJTA March 10, 2009
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The phrase a ‘Gill’ is referred to someone who may agree to a bet, wager, competition etc. where the loser has to participate in a forfeit, but then upon losing, they refuse to comply for no reason, backing out of the original agreement. If a person does this on a regular occasion or has even done this more than once, the may be called a ‘Gilla’ or a ‘Gilly’. Don’t ever make a bet with a ‘Gill’.

A ‘Gill’ may well make a prior agreement, shake hands and agree the stakes, participate in the event/competition, but because they can’t take loosing and/or are not someone of their word they just refuse to undertake the agreed forfeit without any logical explanation.

For example:

Ryan and a group of friends are playing crazy golf, to make the game more interesting they agree that the looser of the game will have to do a forfeit. They shake hands, agree and play the game. Ryan then loses but for some reason, refuses to do the forfeit. Just repeating no, no, no I’m not doing it and walking away, after throwing a sulk because he lost.

“Ryan you lost crazy golf fair and square, don’t tell me you’re going to be a Gill and not do the forfeit, what’s wrong with you?”

Ryan in this incident is a massive Gill, a compete wet blanket and basically a wanker. He may also come up with a number of ridiculous excuses as to why he can’t or shouldn’t complete the agreed forfeit. Never make a bet with Ryan, he will just spoil the fun for everyone. What a complete and utter Gill.
You lost the best fair and square, why are you being a complete Gill?

A bet is a bet, if you lose you pay or do the forfeit. Don't be such a Gill.
by Mandate2017 March 14, 2017
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Your one coworker who's always late, usually by several hours, but somehow never gets fired.
It's fucking 3 now, I was supposed to get off at 10 but it's Gill who was supposed to come in and take over.

When she does come in I should key her car, "10 PM"
by collymclolly May 19, 2021
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One sexy-ass bearded fish-boi who will flop his way into ya girl's DM's and is guaranteed to make the ladies 💦💦
Oh damn that Gill swimming in a school of thots
by YouAlreadyKnowWhoItBe April 15, 2018
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verb. to hang out with someone you don't know very well with the intent to know them better. completely platonic.
adj. describing a person you'd like to gill.
Kristy: I think Matt is a cool person who I'd like to get to know better, but we've only talked a couple of times in econ class.
Ted: You should gill him!
Kristy: Yeah!
by missfantastic January 24, 2014
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Maximum experience or excitement. Over the top or exceeding moderation.
The race car is built to the gills.
by mministerGW3 July 26, 2017
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to be pimp, cool, or down with what is going on in todays society
BRON-BRON is so gill dude.
by gill April 19, 2004
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