Synonyms for No joke:

• adj.

  •absolute (adjective)
  • simple,
  • free,
  • full,
  • infinite,
  • complete,
  • supreme,
  • plenary,
  • sheer,
  • unconditional,
  • consummate,
  • unabridged,
  • downright,
  • utter,
  • flat out,
  • no ifs ands or buts,
  • freest,
  • unadulterated,
  • unrestricted,
  • unqualified,
  • pure,
  • outright,
  • entire,
  • unlimited,
  • straight out,
  • no catch,
  • no fine print,
  • no strings attached,
  • total,
  • thorough,
  • no holds barred.
  •arbitrary (adjective)
  • domineering,
  • tyrannical,
  • dogmatic,
  • bossy,
  • despotic,
  • imperious,
  • magisterial,
  • tyrannous,
  • overbearing,
  • monocratic,
  • autocratic,
  • summary.
  •serious (adjective)
  • smoking,
  • fateful,
  • of consequence,
  • menacing,
  • hard,
  • no laughing matter,
  • severe,
  • difficult,
  • meaningful,
  • laborious,
  • significant,
  • heavy,
  • pressing,
  • ugly,
  • urgent,
  • grievous,
  • grave,
  • arduous,
  • momentous,
  • deep,
  • strictly business,
  • playing hard ball,
  • unhumorous,
  • Operose,
  • worrying,
  • unamusing,
  • major,
  • important,
  • far-reaching,
  • dangerous,
  • strenuous,
  • meaning business,
  • threatening,
  • feller,
  • out for blood,
  • tough,
  • grim,
  • fell,
  • formidable,
  • sobering.

• n.

  •real McCoy (noun)
  • goods,
  • gospel,
  • McCoy.

• Other synonyms:

  •Other relevant words:
  • urgency,
  • seriousness,
  • gravity,
  • stubborn,
  • laughing,
  • stress,
  • Real Mccoy.

Antonyms for No joke:

• adj.

  • absolute
    imperfect, circumscribed, conditional, limited, yielding, restricted, indefinite, complaisant, incomplete, partial, part, abridged, unfinished, bounded, compliant, accountable, qualified, submissive, uncertain, dependent, flawed, needy, tractable.
  • arbitrary
    rational, circumspect, supported, reasoned, democratic, reasonable.
  • serious
    happy, calm, trivial, friendly, funny, insignificant, light, little, meaningless, minor, facile, easy, unimportant, unserious, worthless, flippant, small.