maverick
Concise Oxford English Dictionary © 2008 Oxford University Press:
maverick/ˈmavərɪk/
▶noun
- 1 [often as modifier] an unorthodox or independent-minded person: a maverick politician.
- 2 N. Amer. an unbranded calf or yearling.
– origin C19: from the name of Samuel A. Maverick, a Texas rancher who did not brand his cattle.
'maverick' also found in these Oxford entries:

