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1.
SIBAS(Suck In Breathe And Stare)-This term or action is used when someone is acting gay or just plain stupid.
Person#1:Dude look at that queer!
Person#2:Ugh SIBAS.
Queer:Why are those guys staring at me like that?! Its making me feel like shit.
by Se7oluTion_ January 18, 2007
 
2.
Any kind of knife, including machetes
My new CRKT is the best siba I've ever had!
by Anyone with a knife August 13, 2006