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An unkempt/filthy person of middle to upper class suburban descent (usually white) who in an attempt to rebel against their parents and the establishment cease all forms of hygiene and employment and live off their parents' money while attending music festivals and consuming copious amounts of psychedelic drugs.

When not scoring drugs in festival parking lots, they can be found driving from thrift store to thrift store looking for patchouli and crocheted dread lock caps.
Did you see that festy kid trippin face at Vibes shouting the 4 Grateful Dead lyrics he knew?

Muffy and Charles were appalled to learn that their beloved son Preston had succumbed to the festy kid movement and had drained their bank account in order to follow the Disco Biscuits summer tour.
by indyrae/sarahparker August 03, 2010
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