A reference to shrooms as they are a blue fungi. After being exposed to air, psilocin, an active chemical in shrooms, oxidizes and turns blue in color. This makes shrooms bluish in color.
“Did you meet the blue fun guy yesterday?”
“Yeah, and he sent me to the moon.”
by Dexan the 1 and 0n14 February 12, 2020
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aka Closet Homosexual

When a guy goes around boasting about how great he is and how gay other guys are compared to him, this is known as a super happy fun guy. Also, when a guy tries to tell other guys how gay they are and makes up all sorts of gay fantasies about them, this is known as a super happy fun guy. His fixation on all things gay and homosexual will be glaringly obvious. His narcissistic glorification of his body and obsession with other males' bodies and exercise regimes will creep out everyone, even the "flaming faggots." He will brag about his ability in bed, but his dick pics will be pencil thin. He will claim to adore the female body, but his very vocal fantasies will all be about gay sex. He will loudly and hurriedly deny any inclination towards homosexuality, but nobody will believe him.
"You are a fat boring vanilla bitch and can't even suck a dick right."

"Wow! You sound like a super happy fun guy."

"OMG. This super happy fun guy kept asking me about my nail polish."

"Are you serious?! I thought he said he's straight?"

" Idk but that was pretty gay of him to ask."
by INTJBlackUnicorn July 11, 2017
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aka still hiding in the closet

This guy hasn’t realized that it’s 2019 now. It’s ok to be gay and like other guys. He still thinks he has to hide in the closet. He will loudly proclaim to everyone how hot he is and how much girls want him. He will brag about what girl he is banging tonight. Unfortunately, because he thinks it’s still the 1800s, he will accuse other guys of being gay. He will post paragraphs of sexual fantasies that he has about these guys yet will claim that these guys look at him this way. A Super Happy Fun Guy is someone to be pitied. Hopefully, his prince charming will rescue him from these unrequited feelings and show him that it’s ok to come out of the closet and be what he is.

This guy is also a stalker of any guy who is better looking and more successful than he could ever be.
“Ugh. This guy just won’t shut up about Cam.”
“I thought he was hooking up with some hot chick?”
“Are you kidding? He’s totally a super happy fun guy.”

“I am so much better than all you guys. Girls drool over my body. Guys wish they were me. Guys and girls wish they could sleep with me, but I’m straight.”
“You are such a super happy fun guy. You’re not fooling anyone.”
by INTJBlackUnicorn January 3, 2019
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Guy fun is a guys mentality put into action
"OH man, I wish I was guy fun."

"How are guys able to have guy fun all the time"
by AEAEAEYEYEYAYQ May 30, 2023
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