Definitions by Notacrook

hammer thumb 

A colloquial expression for 'clubbed thumb', a physiological difference where an individuals' thumb appears shorter or 'ogre-ish' in comparison to normal digits; almost like its been hit with a hammer.

Dude, have you seen Megan Fox's hammer thumb? Its totally fucking gross, bro. I'd still it though.

hammer thumb by Notacrook June 10, 2010