This is the first serious and extensive examination of American cursing from a psycholinguistic-contextual point of view. Several field studies and numerous laboratory-based experiments focus on the relationship between cursing and language acquisitions, anger expresssion, gender stereotypes, semantics, and offensiveness. Censorship, language content of motion pictures, First-Amendment fighting words, sexual harassment, obscene phone calls, and cursing at public schools are analyzed and related to sociolinguistic and psycholinguistic data. Many tables of word-by-word data provide empirical evidence of frequency of occurrence, degree of offensiveness, gender of speaker and age of speaker influences on obscene language usage in America.