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1; The fat motherfuckers that blow up in Left 4 Dead 2

2; something large or notable of its kind.

3; a nuclear submarine with ballistic missiles.

4; a transient construction worker, especially a bridge builder.

5; another name for mountain beaver.

6; short for baby boomer.
Ellis: "I think i heard a boomer!"
Boomer by RH0MBUS December 7, 2019
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OK boomer is a word made to say a old man online or a baby boomer there both boomers there cool
"Boomers are annoying always on face book" I know right.
Boomer by Epic_GuruGamer December 10, 2019
A boomer is you
You are a boomer
Boomer by i love dilfs December 10, 2019
A person who is stupid and likes to irritate people. my nana is a good boomer tho.
Boomer by DUMBHOE!@#$%^ December 13, 2019
An old person who doesn’t understand this century
Boomer by Piperrr December 14, 2019