an overweight, tag along friend that ruins things for the guy trying to get with the girl (the hot girl who is the boomer's friend).
HOLY SHIT GIGI IS SUCH A FUCKING BOOMER. IM TRYING TO GET WITH SARAH, BUT HER FAT, BOOMER FRIEND GIGI IS ALWAYS AROUND
by timhunter5 September 23, 2009

by LosReyes March 21, 2013

Star Trek slang for someone who has spent their entire life aboard deep-space freighters.
http://memory-alpha.org/en/wiki/Boomer
http://memory-alpha.org/en/wiki/Boomer
by Axemantitan April 3, 2009

Some annoying ass old person who thinks they’re the only person alive/thinks they should have it their way because they’re old.
Old person: “It’s not nice to stare at your elders.”
Then stares at a young adult because they have piercings or/and colored hair
Young adult/Teen: “Okay boomer.”
Then stares at a young adult because they have piercings or/and colored hair
Young adult/Teen: “Okay boomer.”
by yasipooh October 16, 2019

by Zoom zzzoomer November 26, 2019

A person who usually has Facebook, will laugh at memes or jokes that are usually not funny. These people will also tend to call millienials, boomers. These people also have a very low knowledge of meme culture and will not find a meme today that's funny, funny or humourous because of their lack of meme knowledge. Boomers will also laugh at minion memes or memes from 2011 to 2017.
"Hey Josue, that 20th century fox intro with an off key recorder playing in the background was not funny. You do realize that's pretty old right, it's not very funny anymore." "Ok Boomer, you're over here laughing at Obama memes."
by Cookie train January 13, 2020
