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Someones kid brother, whom they refer to as a baby, despite their brothers actual age.
Older Borther: "so hows my baby brother doing?!"

Younger Brother: "Shut up, im 24"
by cornandhash January 31, 2011
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Jun 18 Word of the Day
Adj. Something that is expected to have a long lifespan by virtue of having existed for a long time, based on the lindy effect, named for the New York restaurant Lindy's, coined by Albert Goldman and popularized by Nassim Taleb.
cooking with fire is lindy
by mmebs June 13, 2021
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2
A Tiny person that can be annoying and fun to pick on.
They sometimes hit you with golf clubs in an attempt to ask you to play.
When in a car they scream and have a loud annoying laugh while you watch a movie, which totaly ruins it.
Baby Brothers rarly are good,quiet, can talk, and dont ruin laptops with sticky hands and pop their mother so kindly gave to them.
Baby Brother :Waaaaaah!
Olderbro: In watching a movie,shh!
Babybro:(sees funny part) AHAHAHAHAHAHHEEHEHEHEHEAHEHAHEAHEAHEAHEHUEHEAEHAHEE!!!!!!
Olderbro:screw this, im nnot watching it anymore.
by Rambo1283291048 September 17, 2010
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