(v) Shut your bitch ass mouth. Usually used with a ghetto accent when not in acronymn form.
(n) A person who needs to shut his/her bitch as mouth; one who talks too much about nothing anyone cares about.
(n) I had my first day of class, and I had to sit next to some sybam who wouldn't stop asking dumbass questions. I wanted to shoot myself.
(adj) She is so sybammy! She's just rambles on about nothing!