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1.
a word that is really funny to say during class, especially drama class.

doesnt have much meaning exept for the "cock" part. it is really funny if u sing a song, where u say "jibbercock" and then someone in the backround says "cock".
i was bored during class so i just said "jibbercock" at random intervals so that my classmates cracked up.
by david March 15, 2004