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1.
the act of masturbation with the non dominant hand...thumb facing towards the balls.
i have myself an underbob last night....felt like someone else was doing it.
by Geoski July 24, 2006
 
2.
the act of masturbation with the non dominant hand...thumb facing towards the balls.
i have myself an underbob last night....felt like someone else was doing it.
by Geoski July 24, 2006