Cool, tight, gnarly. If someone is treen, they are fun to hang out with and know how to have a good time.
That manny guy is so treen, we've got to hang out with him again sometime.
by manuel kaufman April 26, 2007
1 more definition
An adjective describing an unexplainable event of awesomeness.
I don't know what just happened but man that was SO treen!
by SuburbanGuy March 29, 2012