SIB

Short for "stuck-in-between". An acronym for a group of mature and attractive women who are younger than than the usual age limit for a MILF, yet old enough for proper recognition.

Typical age range for a SIB is between 25 and 29, but there have been reported SIB sightings in women as old as 32.
My friends and I decided to hit up this cougar bar looking for some older women, but instead the bar was filled with SIB's.

Dude, did you just see how hot that SIB was, she was perfect!

SIB Conversation (Actual):
Young Man: Hey girls, how old are you?

Attractive Busty Woman and friend: Ummm...26?

YM: Wow that's perfect, you guys are just what we were looking for, SIBs!
by JM & VP November 21, 2010
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SIB

That person just had a SIB when he punched himself.
by angel71186 January 18, 2009
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SIB

An acronym for a Spooning Induced Boner. A common malady for young, male, virgins. A side effect for the receiver is a minor bruise in the thigh/hip region. This will hurt for 4-7 days minimum, depending on the size of the offending boner.
"Oh man, I have a bruise the size of a quarter on my buttocks! What can it be from?!"

"OOOOOhh that's from a SIB!"
by AMAHAHA July 13, 2008
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SIB

Someone who is well known for being 'Shit In Bed.'
See that irish fella over there, spitting at women off of Blind Date? Bet he's SIB, ask Richard Whitely'
by Derby_Girls January 06, 2004
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Sib

Short for sibling. Brother or sister, mostly for borthers.
Yo, Sib. Mom just said I'm her favorite
by daVirgo June 09, 2005
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sibs

by lionking December 16, 2008
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:Sib

When you're so (either sad or happy) that too many tears are covering your eyes and you can't spell :sob :
"guys I just ate some baby puffs"
"Oh my fukcingh god :sib"
by Gonald June 14, 2021
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