Антонимом being aboveboard

deceitful devious lying shady underhanded dishonest unlawful fake crooked criminal unprincipled dubious lawless shifty unscrupulous dishonorable rogue corrupt dishonourable underhand deceptive iniquitous dodgy venal guileful nefarious evil questionable treacherous fraudulent malfeasant swindling crafty duplicitous suborned double-dealing

unbelievable implausible incredible doubtful fabulous far-fetched improbable unacceptable unlikely unplausible cock-and-bull dubious inconceivable questionable unbelieveable unconvincing unimaginable unreasonable unreliable unthinkable

amoral unprincipled unvirtuous immoral unethical non-moral without morals without scruples without standards unconscionable evil wicked iniquitous indecent dissolute bad dishonest nefarious unscrupulous crooked vile corrupt decadent unrighteous depraved dishonorable sinful devious vicious miscreant rotten unlawful reprobate unfair dodgy unjust wrongful shameless degenerate wrong dishonourable villainous disreputable base underhanded abandoned shady unsavory black graceless cutthroat Machiavellian obscene low-down morally wrong unsavoury

biased nonobjective partial partisan prejudiced inequitable unjust deceiving dishonest parti pris deceitful underhand untrustworthy crooked faithless beguiling deceptive unreliable fraudulent misleading fallacious false insincere delusory specious unfair delusive ex parte one-sided

hidden concealed

restrained

deceitful devious lying shady underhanded

privately

being a crybaby being alone being as being a straight shooter being aware of being busy being above being able to being able being be infuriated be in front of