discourtesy Play nounRude and inconsiderate behaviour. SYNONYMS abruptnessbad mannersboorishnessbrusquenesschurlishnesscrassnesscurtnessdisrespectdisrespectfulnessill breedingill mannersill-mannerednessimpertinenceimpolitenessimpudenceincivilityinsolencelack of civilitylack of mannersrudenessuncouthnessungentlemanly behaviourungraciousnessunmannerliness