Someone who is foolish and easy to make fun of.

Landis Durham
Look at that guy, he’s peeing on a fire hydrant. He’s such a loon!
by Cheesestix12 December 4, 2018
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A boy or a lad on a farm. An Aberdeenshire, Scotland, term.
John was the orra loon (i.e. John was the other/extra working lad
by Coulpert August 7, 2022
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a slang term for a person who continuously flashes their butt, moon, on an alarming amount of occasions. so much so, one might actually need physiological help to deal with the trauma.
jeff: "geez, that guy's a moony loon."
lauren: "you got that right!"
by thatguysfathersfriend September 14, 2020
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Someone who misspells words.
Oh looks Craig spelled “better” as “beter” and Tyler spelled “look” as “loon”. There such beter loons.
by bisexual pragmatist November 20, 2019
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Kia Loon is a tall and lean guy that lives in the land of "Kihomo". Despite his quiet and awkward aura, He is the guy you would always go to for help. His name is the combination of the word "Kia" from KIA motors and the word "Loon" from the word "Loony" (A foolish person). Although Kia Loon is insanely attractive and handsome, he always find himself in 2nd place of everything e.g. being the 2nd most popular guy in school among the ladies.
"Look at Kia Loon, He's such a loony!"
by David Joseph Goseph August 16, 2019
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"Unhand me you greybeard loon!"you said after an old crazy person grabbed you.bA very kind way to tell an old crazy person to let go of you.
by Greybeard Loon August 5, 2022
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Loon meaning psychotic/crazy person and lil meaning small. Does not give a shit about anything, anyone and is impulsive to the max. use caution around these as you never know when they might “loon
That bitch is bad at but a lil loon man, she batshit crazy
by Snskdnsnsksnnsnakknss December 25, 2022
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