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The rock 'n roll head banging motion made by a baby/small child while trying to fall asleep in a seated position. The baby/small child's head slowly nods down only to be jerked back up from the uncomfortable position, creating the head banging motion.
Jill your baby looks so cute trying to fall to sleep.
His baby head bang doesn't look that comfortable.
by TommyBoy7 August 09, 2010
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