A novice cryptocurrency investor who thinks they will become cartoonishly rich after investing a very small sum on a shitcoin.
"John just bought $25.00 of Safemoon, he's a moonboi, so he thinks he'll have a Lambo next week! Lmao!"
by omgnow21 May 27, 2021
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Laszlo, a stock trader from MMGinvest coined the term, "Moonboy" when referring to over-exuberance and unrealistic beliefs and bias by none professional investors who think their investment value will shoot up in price like a space rocket launch towards the moon. an analogy of an extremely lengthy distance upward into the sky then outer space reaching the moon surface. The "Moonboys" entire investment strategy is based upon convincing themselves and others to join them in their crusade to make their initial investment within an asset class and or security gain popularity in order to gain demand pushing higher valuations so the "Moonboy" can off-load their investment onto new buyers purchasing at much higher prices, as a result, gaining massive profits. This type of behaviour can be a result of greed and or desperation, common symptoms are never-ending conversations of becoming rich quick and or daydreaming about exotic sports cars such as Lamborghini's.

moon the earth's natural satellite that shines by the sun's reflected light, revolves around the earth from west to east in about 29¹/₂ days boy a male child from birth to adulthood
Moonboy- "You need to buy this it will 10x this year alone, just buy the dip, if you don't buy now you will miss out, you don't understand prices will never ever be this low again!"
by HODL November 26, 2019
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A boy that is one with the moon
Girl: That Boy Is One With The Moon
Boy: I Wish I Was A Moonboy
by The Little Boy May 11, 2017
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