Top Definition
To be extreme and ride around on little kid trycycle or to be so hardcore that even when u play with toys your still hardcore but then you become KIDCORE
Dude did you see billy he was so KIDCORE when he w\rode that trike down the hill
by Jakeylee11 September 28, 2009
Acting extremely young when you are older then the age of 15. Kidcore could be defined as someone ridding any small childs bike or baby toy around town.
"Dude! Did you see that guy? He was so KidCore on that tricycle."
by BillyE. September 28, 2009
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