A habit, action or object that would be considered inconsistent with one's personality; the one anomaly in a person's pattern of behavior.
Normally, he was an organized person, but his filthy desk was his green towel.
by TaroTart October 30, 2011
used to clean up tooth paste and sprite. A very nice accessory to have hanging off your bed
Nathan has a green towel
by Corey Washington December 12, 2006