Someone or something which is annoying. Can also be used as a verb, ‘gemmin’ in which case it could also be used to describe someone who is lying as well.
You’re such a gem
This is a gem”
“You’re gemmin’ it”
by SL96’ December 17, 2019
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That is one gem^girl, you got there.

I got a gem^ neclace.
by Catri January 14, 2004
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1. Sarcastically refers to something which is "great" or "fantastic," especially a terrible joke or insult.

2. Something that is extremely macabre, provided it is used in a sarcastic sense.

3. Can be used in the stead of something that is precious or wonderful.
1. You're a gay homo.
Wow, how long did it take you to think up that gem?

2. I was on 4chan when I found this gem.

3. Oh, isn't he a gem?
by MegamanTTEX February 28, 2011
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A girl who is Caring to others, positive, Funny, and Smart.
She tries her best to make others happy and laugh with a huge smile on her face.
She is the sunshine to the sunset of every night and day <3
She has many friends who care about her and love her for who she is. She is a pretty girl who people would die over just because they want to be like her <3
She will make your day positive and better and also loves making new friends around the world and will always check on you to make sure you are having a good day and you are okay. She will support you through hard times as well.
Me: Gem is such a Caring girl.
by Skybtslover April 13, 2019
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a slang term for the astrological sign Gemini.

An adjective to describe a physically attractive women.
Simon: So you used to be a Tarus. Based on the change of the tilt of the axis of the earth you're a Gem.
Nancy: I'll always be a Taurus.

Simon: Jennifer is a Gem.
by SsTtUu April 10, 2011
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A measurement of water, first founded in the summer of 2010 at Camp Phoenix in Phoenixville PA.
Counselor " that water bottle looks like Gin"

Camper "what?"

Counselor " I said it looks like a gem! you know, a gem of water..."
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Counselor " I just had a whole Gem of water poured on me"
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Counselor " If you don't stop I'm going to pour 30 Gems of water on you. That's like 30 clouds of water, you're not going to survive that."
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Conversions

A bottle of water = 0.002 of a Gem
One cloud contains one Gem of water
All the water in all the pools of America adds up to be about 1000 Gems of water
by Megaglue July 22, 2010
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A Gem is a combination of physical and personal traits applying to men in the gay community. Typical Gems display many of the following physical traits: baby face, limited body hair, clean-shaven face, fit but not overly ripped body 5'7-5'10 in height , short brown or black hair, ideal and clear white/tan skin tone usually a product of mixed ethnicity (white/asian) or (white/latino), smart and refined (not overly flamboyant) style. Personality traits that Gems display include a sweet slightly feminine voice, loving to give compliments, a posse of female friends, passive aggressive demeanor, and an air of confidence. Gems are usually young and lose their Gem-ness once they turn 26 upon which it is time to become a man.
by Jake the Gem February 12, 2014
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