Boomlet comes from the common term of "Nooblet", a young person (usually a gamer) who is new and/or bad at the game.

The term "Boomlet" is a person who has found their way to the popular "Allies&Axis Unturned RP server" through one of MeLikeBigBooms video.
He's a boomlet, ew. Let's kick him.
by Aussie Chan March 11, 2017
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A boomlet is a Baby Boomer in the making. Boomlets are millennials adopt boomer views due to a number of reasons including proximity, association, or sensual gratification.
22 year old college grad: "The job market is saturated with illegals who are stealing our jobs!"
every other college grad: "ok, boomlet"
by aihiaah December 12, 2019
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Originated from the term nooblet, a boomlet is a player that was brought to this server by the ever-so-popular MeLikeBigBoom Please tell that to all the boomlets on the server
He's a boomlet, kick him from the server.
by RikiMouraPT March 11, 2017
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