Surprise Body. Pronounced "sib." A girl whose body is a lot better than you thought it would be without clothes on.
From Aaron Karo's RUMINATIONS (www.AaronKaro.com)
-I love hooking up with SBs (pronounced “sibs” and short for “surprise body”). There’s nothing like taking a girl’s J.Crew rollneck off and discovering that underneath all that wool was a six-pack and two cannons. My first reaction (that is, after exclaiming “Yahtzee!”) is to suck in my own stomach, which suddenly doesn’t look so hot in comparison. Often times, a SB is also a “wideclops” – a girl whose eyes are too far apart. You can tell you’re talking to a wideclops when you can only look her in the eye one at a time. This is of course very distracting – which is why later their bodies are such a surprise.
-I love hooking up with SBs (pronounced “sibs” and short for “surprise body”). There’s nothing like taking a girl’s J.Crew rollneck off and discovering that underneath all that wool was a six-pack and two cannons. My first reaction (that is, after exclaiming “Yahtzee!”) is to suck in my own stomach, which suddenly doesn’t look so hot in comparison. Often times, a SB is also a “wideclops” – a girl whose eyes are too far apart. You can tell you’re talking to a wideclops when you can only look her in the eye one at a time. This is of course very distracting – which is why later their bodies are such a surprise.
by karofan2005 December 18, 2005
Get the SBmug. geeze you have small boobs
by Kourtland Wenger July 9, 2004
Get the sbmug. 
A fag. A wannabe model/gangster who doesnt have what it takes for either. Notorious for having gay haircuts. May pretend to be of hispanic heritage when not.
by Jason928 January 9, 2008
Get the SBmug. by s-dot c-oder March 10, 2008
Get the sbmug. 
by ssbs October 1, 2010
Get the sbsmug.