The acroynm for the term, smug bastard. Often used to describe a person who is highly sure of themselves. Can be used in a conversation when someone is being a snob-like douche hole.
Sugar Baby. Sugar baby is usually a female (but could be any gender really) that receives gift, money, and more from someone (usually an older man) typically in exchange for something (usually sex)
Can you believe she’s his SB! Did you see all those gifts her sugar daddy got her!
My best friend: *Starts running away*
Me: oh no you don't!
My best friend: Oh yes I do!
Me: get back here you sb!
My best friend: what does that mean?
Me: you stupid bitch!
My best friend: Okay good!
Me: Why good?
My best friend: you are now the sb for telling me haha!
Me: Oh why you little sb I will so be getting you back for this one!