Crossword clues for Don't be so serious! 9 letters:NARCOTICSSerious social problemOHCOMENOWLet's be serious here ...PIZZAFACEOne with serious acne, pejorativelyUPTHEANTEGet serious, gambler-styleFACETIOUSNot meant to be taken seriouslyDEEPWATERSerious difficulty.DRAMEDIESSeriously funny shows?SICKWEAVEFabric that needs serious mending?NEARFATALVery serious, as an accidentDONTLAUGHNo, seriously!OHBROTHERNo, you can't be serious!MARIOCARPSerious complaint from author Puzo?SEAKITTENWhat PETA wants to rename the fish, in hopes that people will stop catching and eating fish (seriously)SOLEMNITYSeriousnessTURNSITONGets seriousEXTENUATERender less serious by giving excuses.OHBROTHER*"Seriously!?"ACUTECAREClinic service for serious injuriesNOSEDIVESSerious downturnsNOKIDDINGAre you serious?JACKKNIFESerious accidentTAKEATOLLResult in serious damageREENACTOROne seriously into Civil War history, maybeUNRIVALEDLacking serious challengeENDEAVORSSerious effortsEARNESTLYSeriously.MORTALSINSerious offense against GodATALOWEBBDeclining seriouslyDEEPWATERSerious trouble, so to speakCOMEONMANDude... seriously?!IMEANCMONSeriously now...SINKSONESWith 48-Across, starts serious work onINAMORATASerious girlfriendBOMBSHELLSerious surpriseINEARNESTSeriouslyREDALERTSWarnings of serious danger (NL Central)HEAVYDATESerious social engagementSMILELESSSerious; dourITSNOJOKEI'm seriousRUSTEATENSeriously weathered, as old carsHEAVYDATESerious romantic outingHUMANRACESeriously endangered group in Mary Shelley's "The Last Man"MORTALSINSerious transgression, in CatholicismKIDAROUNDNot be seriousREDALERTSSerious warningsNEARFATALLike some serious accidentsBELIEVEITSeriously!BOOKWORMSVery serious studentsARCHRIVALSerious competitorWHATGIVESSeriously?