Originally Posted by SeanHart

Main Entry: 1mav·er·ick
Pronunciation: \ˈmav-rik, ˈma-və-\
Function: noun
Etymology: Samuel A. Maverick ?1870 American pioneer who did not brand his calves
Date: 1867
1: an unbranded range animal ; especially : a motherless calf
2: an independent individual who does not go along with a group or party

I think the first definition is more fitting.