Litigious

Adjective

 * 1) Of or relating to litigation.
 * 2) Inclined to engage in lawsuits.
 * 3) Argumentative or combative.

Thesaurus
actionable, aggressive, argumental, argumentative, bellicose, belligerent, bickering, cat-and-dog, cat-and-doggish, causidical, combative, contentious, controversial, dialectic, disputatious, divisive, eristic, factional, factious, ill-humored, irascible, irritable, litigable, litigant, litigatory, logomachic, partisan, pilpulistic, polarizing, polemic, polemical, pro and con, pugnacious, quarrelsome, scrappy, shrewish, wrangling