A word used to describe a man who is endowed with a short and stubby penis with the dimensions of the average sized human thumb.
Fuck you, thumb dick! You are hung like an infant!
by Cballznhoney July 10, 2008
–noun (offensive)

1. a person with a penis the size of a thumb.
2. a stupid, irritating, jackass.
ftballrulz: WAna cyber ?
PalePumpkinHead: This is your mother, thumbdick.
ftballrulz: u r a bull dyke.
by PalePumpkinHead March 16, 2007

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