totally calm and especially chill; not causing harm to anyone; very peaceful
I don't believe he started the fight, that dude is so halcyonic.
by Hal Cyonic March 15, 2015
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Meaning a period of time in the past thought to be peaceful and pleasant
by Girei August 11, 2018
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An all around great person who is always willing to listen and checks in on you. They're an amazing person and be happy if you have them as a friend. Their name shows their uniqueness and individuality. As well as their peacefulness that they hold.
Damn hanging out with Halcyon was so nice. I gotta hangout with them more.
by hollow_gravity♡ June 29, 2021
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sleep pill, makes u pass out in about 30 seconds
wow i just took this......zzzzzzz
by Zer0 Racer January 27, 2003
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A shitty Fictional criminal "Agency" that is named after a fuckin Shopping center in Forsyth County, Georgia. they got fucking destroyed On April 16th, 2017
Halcyon Is my Number one Agency
by DavidFlysBoeing99 November 26, 2021
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an all around great friend. with a great personality and is very physically active who's in amazing shape constantly. with an enormous genitalia this alpha will steal your girlfriend. they are also amazing at video games and have lots of money to spash in your face.
i wish i was a halcyon
by mrbigdongle69 February 19, 2021
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A person who does not care about other’s feelings. She is manipulative, cunning, childish and worst of all tears friends apart from each other. An overall terrible person.
Wow Halcyon is being a really terrible person today.
by joe/seph November 2, 2022
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