n. 25B6; noun
an epileptic fit : CONVULSION, spasm, paroxysm, seizure, attack; Medicine ictus.
a fit of the giggles : OUTBREAK, outburst, attack, bout, spell.
my mother would have a fit if she knew : TANTRUM, fit of temper, outburst of anger/rage, frenzy; informal paddy, stress; N. Amer. informal blowout; formal boutade.
25A0; in/by fits and starts SPASMODICALLY, intermittently, sporadically, erratically, irregularly, fitfully, haphazardly.