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15.
Sib
Self Improvement binge
I was going out to the old port too much, but then got tired of being pathetic, so I started a sib.
av Pahey12345 12 juni 2011
 
16.
sib
Acronym for "sweaty itchy butt" usually caused by inadequate wiping after a B.M., or lack of shower after defecating.
My buttcheeks are sticking together due to this horrible case of sib.
av Robert Seigel 18 november 2008
 
17.
A Sibs is the act of doing EVERYTHING sexually
eg 1.
Girl eating ice-cream
Guy: "Bro, you're doing a Sibs"
Girl: "GAH stop watching me eat" *walks away and hides"

eg 2.
Guy watching Girl brush her teeth.
Girl: *stops* "What?"
Guy: "Wow Sibs, you even brush your teeth sexually."
Girl: *hides in shower*
av PancakesANDBrownies 20 juni 2009
 
18.
Members of the Sigma Iota Beta local sorority at Hope College. Every girl on campus wants to be a SIB but would deny it if asked. They like to party and have a good time but are also the girls you could take home to mom and dad. They are the most down to earth and involved on campus. If you meet a cool girl at Hope, odds are...she's a SIB.
Guy 1: I met these sweet girlslast night. They were hot, fun, and smart.
Guy 2: Were they SIBS?
Guy 1: Yeah
Guy 2: knew it
av John Crimes 21 augusti 2011
 
19.
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'
av Derby_Girls 6 januari 2004
 
20.
Acronym for suck it bitches. Usually used to dis ones friends when having ones intelligence made fun of.
Nick: Aaron, are you sure you have enough wit to perform that action.

Group: *Laughs*

Aaron: SIBS
av Dpie 30 maj 2006
 
21.
sib
SiB = 1337 hax0r, pwn joo

pwn rellik mostly...
Hey i heard SiB pwned Rellik 10-0 at Call of Duty, omg SiB is such a 31337
av unknown 1337hax0r 19 oktober 2004