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.
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!
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 23, 2010
Get the SIBmug. by angel71186 February 18, 2009
Get the SIBmug. 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!"
"OOOOOhh that's from a SIB!"
by AMAHAHA August 5, 2008
Get the SIBmug. See that irish fella over there, spitting at women off of Blind Date? Bet he's SIB, ask Richard Whitely'
by Derby_Girls January 6, 2004
Get the SIBmug. by daVirgo June 23, 2005
Get the Sibmug. 
Get the sibsmug. When you're so (either sad or happy) that too many tears are covering your eyes and you can't spell :sob :
by Gonald June 14, 2021
Get the :Sibmug.