n. 25B6; plural noun (informal)
a fit of hysterics : HYSTERIA, wildness, feverishness, irrationality, frenzy, loss of control, delirium, derangement, mania; Brit. informal the screaming abdabs.
the girls collapsed in hysterics : FITS OF LAUGHTER, gales of laughter, uncontrollable laughter, convulsions, fits; informal stitches.