litigious
1. [ adjective ] of or relating to litigation
Related terms: litigation
2. [ adjective ] (law) inclined or showing an inclination to dispute or disagree, even to engage in law suits
Synonyms: disputatious disputative contentious
Examples:

"a style described as abrasive and contentious" "a disputatious lawyer" "a litigious and acrimonious spirit"

Related terms: argumentative