vulgar

common, ordinary, plain, familiar, popular, vulgar mean generally met with and not in any way special, strange, or unusual. common implies usual everyday quality or frequency of occurrence <a common error> <lacked common honesty> and may additionally suggest inferiority or coarseness <common manners>. ordinary stresses conformance in quality or kind with the regular order of things <an ordinary pleasant summer day> <a very ordinary sort of man>. plain is likely to suggest homely simplicity <plain hard-working people>. familiar stresses the fact of being generally known and easily recognized <a familiar melody>. popular applies to what is accepted by or prevalent among people in general sometimes in contrast to upper classes or special groups <a writer of popular romances>. vulgar, otherwise similar to popular, is likely to carry derogatory connotations (as of inferiority or coarseness) <souvenirs designed to appeal to the vulgar taste>.

coarse, vulgar, gross, obscene, ribald mean offensive to good taste or morals. coarse implies roughness, rudeness, or crudeness of spirit, behavior, or language <found the coarse humor of coworkers offensive>. vulgar often implies boorishness or ill-breeding <a loud vulgar belch>. gross implies extreme coarseness and insensitiveness <gross eating habits>. obscene applies to anything strongly repulsive to the sense of decency and propriety especially in sexual matters <obscene language not allowed on the air>. ribald applies to what is amusingly or picturesquely vulgar or irreverent or mildly indecent <entertained the campers with ribald folk songs>.