Choir slang for a slight, usually uncontrollable and involuntary bobble of the head
and/or jaw while singing. Considered cool for some styles such as pop and jazz but irritating in genres
such as musical theater and especially in film musicals. Vibobble can be considered cute
if involuntary but is usually a bad thing
or done on purpose.
From the words "vibrato" and "to bobble"
-That guy playing Marius had some serious vibobble
-Aww man, if I can't learn to control my vibobble
, I'll never make it on Broadway.
the way his head vibobbles when he hits
that high note.