irréductible Gaulois

Etymology
Literally, indomitable/unconquerable Gauls; allusion to the comic Astérix by René Goscinny and Albert Uderzo, whose main characters are members of a tribe of Gauls so described at the beginning of each album.

Noun

 * 1) an indomitable person, especially a member of a small remaining group and/or one who refuses to be literally or figuratively dislodged from their position while others have been.