† ˈrumpant,ppl.a.Obs.—1 [a. AF.rumpant, = F. rompant, pres.pple. of rompre to break.] Breaking the law, offending. 1621Irish Act 5 Edw. IV in R. Bolton Stat.Irel. 38 Persons..that finde or impeach any of the said vessels Rumpants or forfeits against this Act.