Top Definition
a phrase used to describe something immature or childish. can be good or bad. believed to be invented by krista, but actually invented by her brother, llama.

for short: so juve

"juvenile is as juvenile does"

sooooo juvenile!
L: stupid eric was throwing food off the roof

K: *sigh* so juvenile.
by that's miss bitch to you September 22, 2005

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