Star Trek slang for someone who has spent their entire life aboard deep-space freighters.

http://memory-alpha.org/en/wiki/Boomer

1) Term used to describe the RPG Launcher in the xBox 360 game Gears of War. Also called Boom Shot. 2) Any Gears of War character who uses the Boom Shot (RPG Launcher)

Those who think they can drink a lot, end up drinking too much and puke their guts out resembling a boomer from the Left 4 Dead video games series where a boomer pukes on players.

An annoying "special" zombie in Left 4 Dead 2. It's a fat-ass zombie that throws up on you, making your sight all loopsy like you're on an acid trip.

Some annoying ass old person who thinks they’re the only person alive/thinks they should have it their way because they’re old.

A type of bloated zombie from the Left 4 Dead franchises that pukes on survivors, alerting a horde of common infected

a adult from the baby boom age aka a (baby boomer) the age of 65. The (rapper) if you can call him that jedwill made a song called ok boomer very obnoxious loud song> with very boosted bass. most people see it as a a joke but it is very offensive.