adjective

using or characterized by a great deal of bad language.

a foul-mouthed cop

vulgar,crude,coarse,obscene,rude,smutty,dirty,filthy,indecent,indelicate,offensive,distasteful,obnoxious,risqué,suggestive,racy,earthy,off colour,colourful,ribald,Rabelaisian,bawdy,lewd,salacious,vile,depraved,sordid,X-rated,scatological,profane,foul,blasphemous,abusive,scurrilous,blue