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2.
Looking,smelling or even being like Tom the teenage dirt bag
Yo tom go shower u stink u have the dirtbag shower
by sizzle February 25, 2003
 
1.
An extreme wanderlust brought on by one or more intensely enjoyable experiences with outdoor activities (climbing, hiking, kayaking, snowboarding, cliff diving) that results in greatly reduced productivity as most of your time at work is spent actively wishing that you were back outside, per the dirtbag lifestyle.
Brian used to be so hard-working and down-to-earth, but after his friends took him ski-mountaineering, he's come down with a serious case of dirtbag syndrome.
by dangerCake September 11, 2014