Crossword clues for You can't be serious! 3 lettersAnswerClueSINSerious misstepTAXMake serious demands onYENSerious itchSOTSerious elbow-benderVEXSeriously annoyWARSerious struggleEEKThat seriously just freaked me out!IDAWhere Yellowstone's "Zone of Death" (seriously, look it up) is located: Abbr.ENOBangs called him "a Serious Composer who's also a rock star"WARSerious hostilitiesDUISerious hwy. crimeHITSeriously affectedSINSerious misdeedLAPSeriously outrun on the trackELMOne throwing some serious shadeCPRSome experts recommend humming "Stayin' Alive" to establish a rhythm for it (seriously)ATE/r/_____TheOnion (Reddit subreddit of people taking parody news articles seriously)BAEOne more serious than a BFFICUHospital section for the seriously illSINSerious transgressionYOU___ can't be serious!WARMuch too serious a thing to be left to the military: ClemenceauICUSite for serious treatment, brieflyINTPass gone seriously astray: Abbr.BADSerious, as an injuryESSSerious extreme?DUISerious fwy. violationSINSerious code-breaking?SINSerious no-noWARSerious declarationEONSerious stretchRIPSeriously dump onWAT[u cant b serious]NAWHardly a serious denialARTThe first mistake of ___ is to assume that it's serious (Lester Bangs)NOTYou thought that was serious!YESNo, I'm serious!TSKYou seriously did that?SSRLetters on an Asian map that is seriously out of dateARE___ you serious?WARSerious conflictARTSerious hang-ups?ACLSite of a serious knee injuryOMGu can't be seriousDUISerious violation, brieflyRUEHave serious misgivings aboutREDWith 19-Across, serious warningsCPAOne doing serious crunching in 29-DownDUISerious hwy. violationVOWSerious pledge