What is "champertor"

Champertor \Cham"per*tor\, n. [F. champarteur a divider of fields or field rent. See Champerty.] (Law) One guilty of champerty; one who purchases a suit, or the right of suing, and carries it on at his own expense, in order to obtain a share of the gain.

n. (context legal English) One guilty of champerty; one who purchases a suit, or the right of sue, and carries it on at his or her own expense, in order to obtain a share of the gain.