Someone who is litigious often makes formal complaints about people to a civil court of law. very willing to take disagreements to a court of law - often used to show disapproval (litigieux, from litigiosus, from litigare; LITIGATE)
inclined or showing an inclination to dispute or disagree, even to engage in law suits; "a style described as abrasive and contentious"; "a disputatious lawyer"; "a litigious and acrimonious spirit"