hysterical
1 berserk, beside oneself, convulsive, crazed, distracted, distraught, frantic, frenzied, mad, overwrought, raving, uncontrollable
2 (informal) comical, farcical, hilarious, screaming, side-splitting, uproarious, wildly funny
Antonyms
1 calm, composed, poised, self-possessed, unfazed (informal)
2 grave, melancholy, sad, serious