1) Drop a lawsuit 2) In law, to discontinue 1) To end by a nolle prosequi 
• (v. t.) To discontinue by entering a nolle prosequi; to decline to prosecute. • (v. t.) To discontinue by entering a nolle prosequi; to decline to prosecute.
Nol`-pros' transitive verb [ imperfect & past participle -prossed ; present participle & verbal noun -prossing .] To discontinue by entering a nolle prosequi ; to decline to prosecute. 
Abbreviation of nolle prosequi.
to end by a nolle prosequi.